Grade 7 Science Final
August 16, 2022 | Author: Anonymous | Category: N/A
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7 Science First Quarter
LEARNING ACTIVITY SHEET
Practice Personal Hygiene protocols at all times.
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COPYRIGHT PAGE PAGE Learning Activity Sheet in SCIENCE GRADE 7 Copyright © 2020 DEPARTMENT OF EDUCATION
Regional Office No.Carig 02 (Cagayan Valley) City, 3500 Regional Government Center, Sur, Tuguegarao 3500 “No copy of this material shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of such work for profit.” This material has been developed for the implementation of K to 12 Curriculum through the Curriculum and Learning Management Division (CLMD). It can be reproduced for educational purposes and the source must be acknowledged. Derivatives of the work including creating an edited version, an enhancement of supplementary work are permitted provided all original works are acknowledged and the copyright is attributed. No work may be derived from this material for commercial purposes and profit.
Consultants: Regional Director
: ESTELA L. CARIÑO, EdD., CESO IV, DepEd R02
Assistant Regional Director : RHODA EdD,CESO V, DepEd R02 City Schools Division Superintendent CHERRYT.S.RAZON, RAMOS, EdD,, CESO V, Santiago Asst. Schools Division Superintendent: CHERYL CHERYL R. RAMIRO, PhD, CESE, Santiago City Chief Education Supervisor, CLMD : OCTAVIO V. CABASAG, CABASAG, PhD Chief Education Supervisor, CID : JANETTE V. BAUTISTA, EdD Development Team Writers: ARVIN ANGELO R. MATIAS, CATHERINE MARY C. CO, MARY ANN B. CURIBANG, & MARIBETH C. PERICO, Santiago City National High School, Santiago City WILMA C. ZAMORA, Patul National High School, Santiago City GLADYS B. CASTRO & CLARISSA F. SOLIVEN, Divisoria High School JOSEPHINE D. ANTONIO & MARIBEL S. ADDAUAN, ADDAUAN, Cabulay HS, Santiago City Content Editors: LEILANIE P. DOMINIA, PhD., Education Program Supervisor – SCIENCE CONCHITA C. OBENA, Bannawag Elementary School MARJORIE PILON, Abra Elementary School JOSEPH C. BAHINGAWAN, Santiago City National High School MARIO JAMES S. DELA CRUZ, Santiago City National High School ETHEL URIAN, MT 1, Western Cagayan School of Arts and Trades-SDO Trades -SDO Cagayan Language Editor: PERFECTA BAUTISTA, Education Program Supervisor – ENGLISH Illustrators: EDGARDO ANDRES, Cabulay High School Layout Artists: MAY FLOR VIRAY, Santiago West Central School-SSES JENELYN B. BUTAC, Division Librarian Focal Persons: LEILANIE P. DOMINIA, PhD., Education Program Supervisor – SCIENCE MARIVEL G. MORALES, Division LRMDS Coordinator ESTER GRAMAJE, Education Program Supervisor – SCIENCE, CLMD, DepEd R02 RIZALINO G. CARONAN, Education Program Supervisor LRMDS, CLMD, DepEd R02 – LRMDS,
Printed by: Curriculum and Learning Management Division DepEd, Carig Sur, Tuguegarao City
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Table of
ontents
Competency The learner should be able to describe the components of a scientific investigation Recognize that substances are classified into elements and compounds Distinguish mixture from substances based on a set of properties.
Page Number
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1-10
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11-25
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26-36
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35-41
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42-48
Investigate properties of unsaturated or saturated solutions Express concentration of solutions quantitatively by preparing diff. concentrations of mixtures according to uses and availability of materials.
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SCIENCE 7 Name of Learner: ___________________ ______________________________ _____________ __ Section: ______________________ ______________________________ ___________________ ___________
Grade Level: ______ Date: ____________ ____________
LEARNING ACTIVITY SHEET The Scientific Method Background Information for Learners The scientific method is a tool used by scientists to answer questions about the world. It follows step-by-step procedures which are logical and sequential. This is often conducted in scientific investigations which seek to find out the truth regarding a certain phenomenon. There are series of steps involved in Scientific Method.
The first step is to make OBSERVATIONS. It consists of receiving knowledge through our senses from our environment. e nvironment. Observing things around us will lead to good scientific sc ientific questions that will recognize a problem we wanted to resolve. Second step is to conduct a BACKGROUND RESEARCH in order to learn more on the problem. Learning what others have been discovered about the problem will be easier to conduct an investigation. Third step is to formulate a HYPOTHESIS. This is also known as an educated an educated guess for the possible solution to a problem. It is in the form of statement that is used to predict the outcome of an experiment. Fourth step is to design a procedure for an EXPERIMENT. This is done to test the possible solution to a problem or hypothesis. When you design an experiment, you are controlling and measuring variables. The things things that are changing in an exp experiment eriment are called variables. There are three types of variables in an experiment. The controlled or constant variable (cannot (cannot changed), independent variable (can stand, changed and controlled) and dependent variable (one that is tested and measured). Fifth step is to ANALYZE DATA OR INFORMATION collected during an experiment and to draw CONCLUSIONS (summary of findings) whether to accept or reject the hypothesis. Data can be qualitative qualitative (describes qualities or characteristics) or quantitative (measures values). And last step is to COMMUNICATE THE RESULTS. This is to present findings of the conducted experiment for the information of others.
Learning Competency with Code The learner should be able to describe the components of a scientific investigation (S7MT-Ia-1). (S7MT-Ia-1). Practice Personal Hygiene protocols at all times.
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Activity 1: You Complete Me! Directions: Solve the crossword puzzle using the important terms in Scientific Method. Use Directions: Solve the given clue to complete the puzzle.
Activity 2: Know Your Steps Directions: Identify which step in the Scientific Method is described in each statement. Write only the letter of your choice. A. Recognize aa hypothesis problem B. Formulate
C. hypothesis (testing implies experimenting) D. Test Drawthe a conclusion
__________1. Mark thought __________1. t hought that cactus c actus would grow faster fast er if he puts pebbles pebble s through the soil in which they were planted. __________2. __________ 2. Hanna’s data showed that ants moved away from raw cucumber slices. __________3. __________ 3. Maria Maria wondered if she could extract dye out of of gum gumamela amela flowers and leaves. __________4. __________ 4. Peter grew molds from spoiled bread. He placed drops of different vinegar to see how bread molds react with the substance. __________5. __________ 5. Aling Nena’s experiment showed that duck eggshells were whiter and stronger when she fed the ducks with commercial feeds combined with corn, to which extra calcium had been added. __________6. __________ 6. Jose saw ticks crawling in his dog’s body. He asked the veterinarian, “How are ticks able to grow with his dog ?” Practice Personal Hygiene protocols at all times.
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__________7. Vivien soaked her stained white blouse in water for 24 hours. She used __________7. different kinds of soap and detergents to get rid of the stain. __________8. __________ 8. Jojo said, “If I plant monggo seeds in the afternoon, I think the plants will grow more robust than the plants grown in the morning .” __________9. __________ 9. If 50 mL of water are added to my plants each day and they grow, then adding 100 mL of water each day will make them grow even more. __________10. __________ 10. After working in the laboratory, the student found out that bacteria grow more11. on less __________ __________11. The acidic baristaenvironments. filled two identical glasses with the same amount of tap water. He added varied amounts of salt into the substance. He then t hen placed the mixtures into the freezer overnight. __________12. __________ 12. The singer predicted that there is an increase or decrease in a person’s heart rate if people listen to music. __________13. __________ 13. A kindergarten observed that his apple a pple slice slicess turned t urned brown after few minutes. He asked his mom if there is any way he can help stop the apple from turning brown. __________14. __________ 14. After Afte r finishing his breakfast, Angelo said sai d that t hat hot choco c hoco melts melt s faster f aster in hot water than in cold water. __________15. __________ 15. Malunggay Mal unggay trunks shall be planted pla nted in different areas. The plants will be watered daily. Over a period of a week, the plants will be measured to see which ones grew the tallest.
Activity 3: What’s The Problem? Directions:: Write one scientific problem based on the situation given in each item. Directions item. 1. Lance and his classmates went to the farm to gather different kinds of leaves needed for their assignment. Before going to the area, Lance sprayed his favorite body cologne. When they were done gathering, one of his classmates noticed that Lance got a lot of insect bites on his back while the rest of the group who did not put some cologne on their body got none. Lance became curious if this has something to do with spraying his favorite body cologne. ________________________________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________ _____________________ ___________ _____________________ _______________________ _______________________ ______________________ ____________________ _________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________ 2. During their school intramurals, a volleyball match between betwee n competing teams took place on the school grounds under the heat of the sun. Team A wears white jersey shirts while Team B has black jersey shirts as their uniform. After the game, their respective coaches noticed that Team B players felt hotter and a nd produced more body sweat than Team A players. They are trying to figure out if their observations are connected with their respective jersey uniforms. Practice Personal Hygiene protocols at all times.
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________________________________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ _______________________ _______________________ ______________________ ____________________ _________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________
3. Anna received a fancy fa ncy necklace as a gift during th her 7 birthday from her mother. Within two months, her mother noticed that the metal pendant
has changed color and turned rusty. Anna’s mother wanted to get rid of the rust from the pendant and has recently viewed from youtube that vinegar can quickly remove rust from metal chains and screws. Unfortunately, she only has calamansi on their kitchen. She wondered if she can use calamansi extract instead. _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ _______________________ _______________________ ______________________ ____________________ _________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ ________________________________ _____________________ ______________________ ______________________ ________________________ _____________________ ________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________
4. The pastry chef is baking different flavors of
bread for the Valentine’s day. She plans to prepare brownies and cinnamon roll. When she was done baking the goodies, she has left both the chocolate brownies and cinnamon roll on top of the table for cooling. She observed that flies started to go near the chocolate brownies while the cinnamon roll remained remai ned untouched not even a single fly went near it. She started to think if the cinnamon ingredient she used caused her observation on repelling the flies. ________________________________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ ______________________ ___________ ______________________ ______________________ _____________________ _____________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________
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5. After preparing food for lunch, Manang Elsa put the eggshells in the pots of her orchid plants instead of throwing in the garbage bin. She wanted to see her plants grow healthier soon but did not want to use chemical fertilizer to speed up the growth of her orchid plants. After five days, she woke up to see the plants increased in size and had even greener leaves. ________________________________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ ______________________ ___________ ______________________ ______________________ _____________________ _____________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________
Activity 4: Let’s Analyze! t hat corresponds to Directions: Read the scientific investigation story below. Choose the letter that Directions: Read your answer. A group of Grade 7- Rizal students came across one interesting vlog of their favorite social media influencer that touches the idea of giving music to plants. It is from this fascinating idea that they thought of conducting similar investigation as part of their requirements in their science subject. They started to read books, surf the internet and study researches on the effect of music to plant growth. Members from the group continued to formulate their respective experiment.hypotheses. They went on performing a simple The group selected two San Francisco plants of similar size planted on the same type of soil and kind of pots. Both plants were wer e healthy. Each plant were placed in separate rooms with wit h a window exposed to full sunlight and were watered with equal amounts every day. They measured the height of the plants. Once a day, they played classical music on room 1 for about one hour while leaving room 2 with no music played. Over a period of two weeks, they noted significant
differences in each plant’s growth. Practice Personal Hygiene protocols at all times.
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Multiple Choice: 1. What was the problem in the Grade 7- Rizal’s experiment? a. Which San Francisco plant is taller? b. What kind of music should be given to plants? c. How long can plants grow? d. Does music make a plant grow faster? 2. What do you think their hypothesis was? a. San Francisco plants grow because of sunlight. b. There is no change in size of the San Francisco plants because it got equal amounts of water. c. Music can help plant grow faster. d. Plants need good soil to grow faster.
3. How did they test their hypothesis? a. They placed two plants in one room and gave music to each. b. They planted the San Francisco in different pots and gave music to each. c. Same plants in similar soil and pots; both receive music. d. Same plant in similar soil and pots, with equal water and sunlight; only one plant received music. 4. What was the variable in the experiment? a. Presence of sunlight b. Giving of music to one plant and no music to the other c. Amount of water d. Similar soil and pots for both plants 5.
What do you think the group’s conclusion was? a. Plants grow with enough nutrients b. There is an increase on plants height when given music c. Music has no effect on plant growth d. Rich soil, water and sunlight are needed by plants
6. Which is not a step in the scientific method? a. Formulate hypothesis c. Research b. Conduct experiment d. Ask people’s personal opinions 7. What is the first step in conducting a scientific investigation? a. Arrive at a conclusion c. Observe and ask questions b. Analyze data d. Test the hypothesis 8. What is the independent variable in the experiment? a. Location of the plants c. Type of soil b. Amount of sunlight d. Music given 9. What is the dependent variable in the experiment? e xperiment? a. Amount of water c. Plant growth Practice Personal Hygiene protocols at all times.
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b. Type of music
d. Size of the room
10. What is final step of the scientific method? a. Record data c. Make conclusions b. Communicate results d. Recognize a problem
Activity 5: Try It Out Directions: Identify the problem in the given situation and give a conclusion using the steps Directions: Identify of Scientific Method. You bought a dozen of pandesal bread in the nearby bakery store from your house. You ate 10 pieces of it during snacks time in the afternoon with your friends. The two unconsumed pandesal bread were left inside the paper bag over the next three days. You noticed that after two humid days, tiny water droplets appearing like couple of sweat had accumulated inside the bread bag which was dark. The leftover pandesal bread began to moisten. During the 3rd day, you eventually seen clusters of grayish spots on the bread surface and it smelled a foul odor. You asked your mother about it and she advised not to eat them anymore because molds were already present in the pandesal. Observation/s: Observation/s: _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ Problem: ______________________ ___________ ______________________ ______________________ _____________________ _____________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ Hypothesis: _____________________ ___________ _____________________ _______________________ _______________________ ______________________ ____________________ _________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ Conclusion: _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ Practice Personal Hygiene protocols at all times.
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________________________________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________
Reflection Reflection I learned that Scientific Method i Method iss important be because____________ cause________________________ ____________________ ________ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ ____________________ _________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________ ___________ _____________________ ______________________ _______________________ ______________________ ______________________ ____________________ _________ ______________________ ___________ ______________________ ______________________ _______________________ ______________________ ___________________ _________
References for Learners Allas, Ian Mark F. et al. (2013). Discover Science: K to 12 Edition. Editi on. Makati City, Philippines: Diwa Learning Systems Inc. Rabago, Lilia M. et al. (2003). Dynamic Science:An Integration Integ ration of Physical and Biological Sciences. Sciences . Quezon City, Philippines: Vibal Publishing House Inc. Ramos, John Donnie A. et al. (2013). Exploring Life Through Science Series. S eries. Quezon City, Philippines: Phoenix Publishing House, Inc. Science Buddies. (2002-2020). Steps of the Scientific Method . Retrieved from https://www.sciencebuddies.org/science-fair-projects/science-fair/steps-of-thescientific-method Photo Credits https://www.pikrepo.com/netex/green-cactus-in-white-ceramic-pot https://pxhere.com/en/photo/354625 https://commons.wikimedia.org/wiki/File:Tick_before_and_after_feeding.jpg https://www.flickr.com/photos/34745138@N00/2234750993 https://pixabay.com/vectors/coffee-hot-drinking-tea-beverage-25194/ https://www.pacaf.af.mil/News/Article-Display/Article/593035/dont-let-the-summer-bugs bite-pest-management-helps-keep-airmen-safe/ https://www.pikrepo.com/funom/gold-and-silver-necklace-on-white-chair https://www.pikrepo.com/fmaoz/photo-of-man-baking-bread https://pxhere.com/en/photo/521310 https://www.wallpaperflare.com/selective-focus-photography-of-eggshells-filled-with-waterwallpaper-wgsel https://upload.wikimedia.org/wikipedia/commons/b/bf/Colpfl05.jpg https://commons.wikimedia.org/wiki/File:Verschimmeltes_Brot_2008-12-07.JPG
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Answer Key Activity 1: You Complete Me!
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Assessment Rubric for Activity 5: Try It Out Assessment Criteria Content
Organization
Correctness of grammar
Completeness
Indicators for the Levels of Performance 1 point 3 points 5 points The answers are The answers are The answers are not accurate, not comprehensive accurate, and comprehensive, but not accurate comprehensive, and not clearly and clearly and clearly presented presented presented SOME of the MOST of the ALL the ideas ideas are not ideas are not are logically logically logically sequenced sequenced sequenced The answers The answers The answers are have many have some free from grammatical grammatical grammatical errors errors errors The output The output The output includes some some includes most most includes all the all the of the required information. It
of the required information. It
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Score
required information. It 10
lacks several relevant answers
lacks some relevant answers
shows all relevant answers
Prepared by: ARVIN ANGELO R. MATIAS Writer Santiago City National High School
SCIENCE 7 Name of Learner: ___________________ _____________________________ _____________ ___ Section: _____________________ _____________________________ ___________________ ____________ _
Grade Level: ______ Date: ____________ ____________
LEARNING ACTIVITY SHEETS Elements and Compounds Background Information for Learners The substance of the universe is called matter matter.. Matter is generally referred to as anything that has mass and takes up space. Matter is classified into pure substance and mixture. Pure Substance is being classified into elements and compounds. Elements are substances that cannot be separated into simpler substances. The smallest Elements are particles of matter are called atoms. An atom is the smallest particle of an element. element. A chemical symbol is a shorthand method used by chemist to represent an element. e lement. Chemists use one or two letters to represent elements. All matter is i s made up of elements which are substances with only one type of atom. There are 118 elements currently on the Periodic Table. The modern periodic table is used to organize organiz e all the known elements. They are arranged in the table by increasing atomic number. Each element is represented represe nted by its chemical symbol and the number above each symbol is its atomic a tomic number. Elements can be classified into three: metal, nonmetal and metalloid or semi-metal. semi-metal . Metals are typically t ypically hard, shiny, malleable, ductile and good conductors of heat and electricity. Nonmetals are usually brittle, non-malleable, have du dull ll appearance and poor poor cond conductors uctors of h heat eat and electricity. Semi-metals or metalloid are elements that exhibit both the properties of metal and nonmetal. The metalloids separate the metals and a nd nonmetals on a periodic table. Also, many periodic tables have a stair-step stair -step line on the table identifying the element groups. The line begins at boron (B) and extends down to polonium (Po). Elements to the left of the line are considered metals. Elements just to the right of the line exhibit properties of both metals and nonmetals and are termed metalloids or semimetals . Elements to the far right of the periodic table are nonmetals. The exception is hydrogen is hydrogen (H), the first element on the periodic table. table . At ordinary temperatures and pressures, hydrogen behaves as a nonmetal.
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A compound compound is a substance formed when two or more elements are chemically joined. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of. A chemical formula is used a quick way to show the composition of compounds. In this activity sheets, you are going to understand and recognize the properties of elements and compounds.
Learning Competency with Code Recognize that substances are classified into elements and compounds (S7MT-Ig-h-5). ACTIVITY 1: The Search Is On! Directions: Encircle the common elements and compounds in the puzzle. The word can be arranged arra nged
in vertical, horizontal and diagonal only.
Guide Questions 1. How many elements did you find in the puzzle? What are they? ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ _______________________ _______________________ ______________________ ________________ _____
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2. How many compounds did you find in the puzzle? What are they? ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ _______________________ _______________________ ______________________ ________________ _____
ACTIVITY 2: The A B C’s in in Matter
Figure 1: Modern Periodic Table https://www.sciencenewsforstudents.org/article/scientists-say-periodic-table ) ( https://www.sciencenewsforstudents.org/article/scientists-say-periodic-table
Directions: Write the name of the element in each box and its corresponding group number. Symbol Name of Element Al B C Dy Er F Ga H Practice Personal Hygiene protocols at all times.
Group Number
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I K La Mn N O P Rn S Ti U V W Xe Y Zn Guide Questions: 1. How many elements are there in the modern periodic table? _____________________ __________ _____________________ _____________________ ______________________ ______________________ _________________ ______ __________ _____________________ _____________________ _____________________ ______________________ ______________________ _________________ ______ _____________________ __________ _____________________ _____________________ ______________________ ______________________ _________________ ______ 2. How are the chemical symbols of elements written? _____________________ __________ _____________________ _____________________ ______________________ ______________________ _________________ ______ _____________________ __________ _____________________ _____________________ ______________________ ______________________ _________________ ______ _____________________ __________ _____________________ _____________________ ______________________ ______________________ _________________ ______
ACTIVITY 3: I’m Puzzled clue. Directions: Complete the crosswords by filling in a word that fits each clue.
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Across: 2. element with atomic number 1 3. composed of 1 type of atom/molecule with uniform properties 5. chemical formula for sodium chloride 7. 2 or more elements that can c an be decomposed by chemical change 9. a group of two or more atoms instead of made up of matter 11. gas used for breathing 12. smallest particle of matter Down: 1. anything that has mass and space 4. made up of hydrogen and oxygen 6. discuss the Father of Modern Periodic table in the background information 8. one of the noble gas element 10. simplest substance that cannot be decomposed
ACTIVITY 4: Fix Me Up! A. Directions: Directions: Identify the CHARACTERISTICS of elements and compounds described in column A by arranging the jumbled letters in Column B. Write your answer in column C.
A Characteristics of Elements and Compounds Anything that has mass and occupy space
B Jumbled letters
C Answer
TAMTER
_____________
TELEMEN
_____________
TOAM
_____________ _____________
POCUNMOD
_____________
Substance that cannot be separated into simpler substances The smallest particle of an element Substance formed when two or more elements chemically joined A letter or letters used by Chemists to represent an element A quick way to show the composition of a compound
MYSLOB _____________ ___________ __
LAMFORU
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B. Directions: Directions: Identify the NAMES of elements and a nd compounds in column A by arranging the jumbled letters in Column B. Write your answer answer in column C.
A Elements/Compounds Ca
B Jumbled letters CLAMICU
C Answer __________ ____________ __
Fe
NIRO
____________ ____________
CO2
ACBORN DIODXIE
____________ ____________
H2O
RAWTE
__________ ____________ __
O
GENOXY
____________
ACTIVITY 5: Where Do I Belong? Write the chemical symbol of the following elements and classify them into metal, Directions: Write non-metal and metalloids/semi-metal by metalloids/semi-metal by putting a check on the corresponding column. column. Element
Chemical Symbol
Metal
Non-metal
Semi-metal
Aluminum Boron Bromine Calcium Carbon Copper Fluorine Gallium Gold Iron Oxygen Silicon Silver Sodium Sulfur Guide Questions: 1. How do metallic elements differ from non-metallic elements? _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________
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ACTIVITY 6: Let’s Divide The Pie! Almost 99% of the mass of the human body is made up of six elements: oxygen oxygen,, carbon,, hydrogen carbon hydrogen,, nitrogen nitrogen,, calcium calcium,, and phosphorus phosphorus.. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. All 11 are necessary for life. You may refer to the illustration below on the amount of vital elements in the human body. Others
3%
Nitrogen
Hydrogen 10%
Carbon 18% 65% Oxygen
Figure1. The main elements that compose the human body (including water) Directions: Based from the illustration above, fill out the pie chart with the correct element/s corresponding to their amount or quantity present in the human body body
4.
5.
3.
2.
1.
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Guide Questions: 1. What are the important elements in the human body? _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________ 2. Which element is the most abundant in the human body? ________________________________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________
Activity 7: Fill Me Up! Directions: Identify whether each substance in the table is element or o r compound. Write E for element and C for compound.
Substance
Diagram of Molecule
1. Carbon Monoxide
2. Hydrogen Chloride
2. Sodium Hydroxide
O
C
Cl
H
O
Na
Element / Compound
H
3. Nitrogen N
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4. Water
5. Oxygen
H
O
O
H
O
Guide Question: 1. How is an element differentiated from compounds? _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________
Activity 8: Am I Useful? Directions: Below are the lists of some compounds and their chemical formula. Write the uses/importance of each compound.
Compound Name 1. Sodium Chloride/ table salt 2. Calcium Carbonate/toothpaste 3. Sucrose /table sugar
Chemical Formula NaCl
CaCOз C12H22O11
4. Sodium Bicarbonate/ baking soda
NaHCOз
5. Acetic Acid/vinegar
CH3COOH
6. Ethanol/alcohol
Uses/Imp Uses/Importance ortance
C₂H₅OH
7. Carbon Dioxide/gas
CO₂
8. Water
H₂O
9. Hydrogen Peroxide/ mouthwash 10. Ascorbic Acid/ Vitamin C
H₂O₂ C₆H₈O₆
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Reflection Your journey through these lessons has been an additional experience. Complete tthe he following statements: I have learned that that _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ I realized that that _________________________________ _________________ _________________________________ _________________________________ ________________________________ ________________ _____________________________________ ___________________ ___________________________________ _________________________________ ____________________________ ____________
I will commit to to _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________
References for Learners Books 1. Gutierrez, M. (1999). Science and Technology for the Modern World (pp. 102-105). Bangkok, Thailand: Watana Phanit Printing and Publishing Co. Ltd. Ltd. 2. Religioso, T., & Vengco, L. Integrated Science. Retrieved 31 May 2020, from
3. Soriano, E., Santisteban, C., & Elauria, E. (2000). Chemistry for the New Millenium (pp. 4345). Quezon City: Adriana Printing Co., Inc. Inc. 4. Valdoz, M., Abistado, J., Mariano, J. and Madriaga, E., 2013. Science Links. 1st ed. Quezon City: REX Book store, pp.63-67. pp.63-67. Website 1. Composition of the human body. (2020). Retrieved 30 May 2020, from https://en.wikipedia.org/wiki/Composition_of_the_human_body https://en.wikipedia.org/wiki/Composition_of_the_human_body 2. 3.04: Elements and Compounds. (2020). Retrieved 30 May 2020, from https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Chem_51/03%3 A_Matter/3.04%3A_Elements_and_Compounds A_Matter/3.04%3A_Elements_and_Compounds Practice Personal Hygiene protocols at all times.
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3. Elements and Compounds. (2020). Retrieved 30 May 2020, from https://www.nyu.edu/pages/mathmol/textbook/compounds.html https://www.nyu.edu/pages/mathmol/textbook/compounds.html 4. (2020). Retrieved 30 May 2020, from https://www.google.com/search?q=elements+and+compounds+activity+sheets&tbm=isch&v ed=2ahUKEwjd8tXTv83pAhWmzYsBHZBUBdcQ2ed=2ahUKEwjd8tXTv83pAhWmzYsBHZBUBdcQ2- 5. (2020). Retrieved 30 May 2020, from https://www.google.com/search?q=elements+and+compounds+activity+sheets&tbm=isch&v ed=2ahUKEwjd8tXTv83pAhWmzYsBHZBUBdcQ2cCegQIABAA&oq=elements+and+compounds+activity+sheets&gs_lcp=CgNpbWcQA1Dftg FYgc0BYK3XAWgAcAB4AIABQqIAaYlkgEKMC4xMC42LTEuMpgBAKA QqIAaYlkgEKMC4xM C42LTEuMpgBAKABAaoBC2d3cy13aXotaW1n&sclient=img&ei= BAaoBC2d3cy13aXotaW1n&sclient=img&ei= Se7KXp2qEKabr7wPkKmVuA0&bih=657&biw=1366 Se7KXp2qEKabr7wPkKmVuA0&bih=657&biw=1366 6. (2020). Retrieved 30 May 2020, from from https://www.quora.com/What-are-the-mostcommon-chemical-compounds-we-use-in-our-daily-life common-chemical-compounds-we-use-in-our-daily-life 7.https://www.google.com/search?ei=bk7TXuKlBO3KmAX65bzIDA&q=Based+from+the+ compounds+listed+above%2C+what+is+the+most+important+compound+used++in+your+ai ly+life%3F&oq=Based+from+the+compounds+listed+above%2C+what+is+the+most+impor tant+compound+used++in+your+aily+life%3F&gs_lcp=CgZwc3ktYWIQAzoECAAQRzoE CCEQClDFFViEswN CCEQClDFFViEswNg7bUDaABwAXgBgAGzDog g7bUDaABwAXgBgAGzDogBvJEBkgETMC4yMy BvJEBkgETMC4yMy4xMi4yLjMuNC4 4xMi4yLjMuNC4 wLjQuMpgBAKABAaoBB2d3cy13aXo&sclient=psyab&ved=0ahUKEwjilPy7vN3pAhVtJaYKHfoyD8kQ4dUDCAw&uact=5 ab&ved=0ahUKEwjilPy7vN3pAhVtJaYKHfoyD8kQ4dUDCAw&uact=5 8. The modern periodic table of elements - Google Search. Sear ch. (2020). Retrieved 31 May 2020, from https://www.google.com/search?q=the+modern+periodic+table+of+elements&oq=the+moder n+periodic+table+of+elements&aqs=chrome..69i57j0l7.9231j0j9&sourceid=chrome&ie=UT F-8 F-8
Others 1. Canva 2. Crossword Puzzle Creator 3. STARBOOKS 4. Wordsearch
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Answer Key
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1. Metallic elements are hard, lustrous and good conductors of heat and electricit electricity y while non-metallic electricity. elements are brittle, have dull appearance and poor conductors of heat and
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Activity #7: Fill Me Up! Element or Substance
Diagram of Molecule
Compound
1. Carbon Monoxide
O
C
Compound
2. Hydrogen Chloride
Cl
H
Compound
1. Sodium Hydroxide
O
2. Nitrogen
3. Water
4. Oxygen
Na
H
N
H
Element
N
O
O
Compound
H
O
Compound
Element
Guide Question: 1. An element is a pure chemical substance made of same type of atom while compounds contains atom of different elements chemically combined together in a fixed ratio.
Activity # 8: Am I Useful? Useful?
Compound Name 1. saltSodium Chloride/ table
Chemical Formula NaCl
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Uses/Importance Uses/Importance Used to season food Answer may vary 24
2. Calcium Carbonate/toothpaste
CaCOз
3. Sucrose /table sugar
C12H22O11
4. Sodium Bicarbonate/
NaHCOз
baking soda 5. Acetic Acid/vinegar 6. Ethanol/alcohol
Natural gas Answer may vary Used for cooking Answer may vary
CH3COOH
C₂H₅OH
7. Carbon Dioxide/gas
CO₂
8. Water
H₂O
9. Hydrogen Peroxide/ mouthwash
H₂O₂
10. Ascorbic Acid/ Vitamin C
Calcium supplement Answer may vary
C₆H₈O₆
Stimulant in coffee Answer may vary For disinfectant Answer may vary Carbonating agent in soda Answer may vary For drinking Answer may vary Used as a mouthwash Answer may vary Essential vitamin Answer may vary
Prepared by:
GLADYS B. CASTRO CLARISSA F. SOLIVEN Writers Divisoria High School
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SCIENCE 7 Name of Learner: ___________________ _____________________________ __________ Grade Level: ___________ Section: _____________ ________________________ ___________________ _____________ _____ Date: ______________ ________________ __
LEARNING ACTIVITY SHEET Distinguish Distingu ish Mixtures from Substances Based on a Set of Properties Background Information for Learners There are two classifications of matter: matter: Substance Substances are form of matter that has has definite and unchanging chemical compositions. Substances are further f urther broken down into elements and compounds. Properties of substance: 1. Has constant chemical composition and characteristic properties. 2. It cannot be separated into components without chemical bonds. 3. Substance can be solid, liquid, gas and plasma. Changes in temperature or pressure can cause substances to shift between the different phases of matter. Mixture Mixture A mixture is a material system made up of two or more different substances which are mixed but not combined chemically. It is i s a physical combination of two or more substances in which the identities of the individual substances are retained. Mixtures take the form of alloys, solutions, suspensions and colloids. The amount of each substance in the mixture is not fixed. In this activity sheets, you will be able a ble to distinguish mixture from substances based on a set of properties. .
Learning Competency and Code Distinguish mixture from substances based on a set of properties (S7MT-Ie-f-4).
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Activity 1: OOPS! IDENTIFY ME! DIRECTIONS: Identify the following samples if it is a MIXTURE MIXTURE or SUBSTANCE SUBSTANCE.. Write your answer on the space provided. __________________ __________ ________ 1. Acetic acid __________________ __________ ________ 2. Butter __________________ __________ ________ 3. Diamond __________________ __________ ________ 4. Steel __________________5. __________ ________5. Rubbing Rubbing alcohol __________________6. __________ ________6. Sulfur Sulfur __________________7. __________ ________7. Gold Gold Bar __________________8. __________ ________8. Baking Baking Soda __________________9. __________ ________9. Ink Ink __________________10. __________ ________10. water __________________11. __________ ________11. Pizza __________________12. __________ ________12. Sugar __________________13. __________ ________13. Hydrogen __________________14. __________ ________14. Coffee __________________15. __________ ________15. Sand Guide Questions: 1. How did you identify whether the samples are substances substance s or mixtures? _____________________ __________ ______________________ ______________________ _____________________ ___________________ _________ _____________________ __________ ______________________ ______________________ _____________________ ___________________ _________ 2. Are substance and mixture essential to our daily living? Write a brief explanation of your answer. _____________________ __________ _______________________ _______________________ ______________________ __________________ _______ _____________________ __________ ______________________ ______________________ _____________________ ___________________ _________
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Activity 2: WORD HUNT! HUNT! Directions: Underline the word if it is a substance and encircle if it is a mixture. The word can Directions: be arranged in vertical, horizontal and diagonal only.
A
L
U
M
I
N
U
M
I
S
C
H
L
O
R
I
N
E
M
U
S
A
L
E
R
G
H
O
I
C
A
D
B
L
O
O
D
L
L
R
G
S
A
H
F
L
C
I
K
O
D
H
O
D
I
D
I
K
D
S
L
Y
T
I
L
O
P
L
S
E
H
K
O
E
L
E
M
E
N
T
M
A
Y
O
N
A
I
S
E
L
L
S
P
A
P
K
P
L
L
P
D
W
I
Y
A
I
O
L
P
U
L
L
O
F
I
X
E
D
L
R
C
O
M
B
I
N
E
K
J
E
Guide Questions: 1. How many substances and mixtures did you find? What are they? t hey? ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ 2. What is the difference between a substance and a mixture? ______________________ ___________ ______________________ _______________________ _______________________ ______________________ ________________ _____ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______ 3. Is mixture can be separated from its physical components? If yes how? _________________________________ ______________________ ______________________ ______________________ ______________________ _________________ ______ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ _________________ ______
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Activity 3. 3. LET’S CONNECT Directions: Complete the Venn diagram Directions: dia gram below by picking out the words in the box that shows similarities and differences between substance and mixture.
made up of 2 or more components
definite composition
matter
homogenous
compound
heterogeneous
components may be separated
elements
may be solid, liquid, gas
containing only one type of particle
DIFFERENCES
SIMILARITIES
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DIFFERENCES
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Activity 4: IS IT SUBSTANCE OR MIXTURE? Directions: Classify the different samples of substances and mixtures from given images Directions: below by putting a check on the the corresponding column. Images
Substance
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Mixture
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Activity 5: GROUP ME! Direction: Write the properties of substances and mixtures on the table based on the Direction: given properties below. Properties: 1. It is a combination of two or more substance 2. It is a compound 3. It cannot be separated by physical means 4. It can be an example of a solution 5. It can be separated by physical means 6. It is not a combination of two or more substance 7. It can be combined chemically 8. It cannot be combined chemically 9. With two types homogeneous and heterogeneous 10. Elements and compound are both example Practice Personal Hygiene protocols at all times.
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Properties Substance
Mixture
Activity 6: FACT OR BLUFF Directions: Write Directions: Write FACT FACT if the statement is correct and write BLUFF BLUFF if the statement is incorrect. Write your answer on the space provided. _________1. Mixture comes in different concentration. _________2. Mixture has a unique set of properties from its original composition. _________3. Substance can be separated from its original composition. _________4. In heterogeneous mixture, the make-up is uniform and every constituent of the mixture has the same properties. _________5. Mixture can undergo the processes processes of filtration filt ration and distillation. _________6. The proportion of the components components in substance is variable. _________7. Blood is a mixture that can be separated by a machine called centrifuge. _________8. Mixture and substance are form of matter. _________9. Smoke is an example of substance. _________10.. Flour and sugar may be combined _________10 combined to form a mixture.
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Reflection From the different activities about substances and mixtures, I have learned that _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ ______________________ _______________________ ______________________ ______________________ ____________________ _________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ________________________ _______________________ ___________________ _________
References Books Angeles Delfin C. Et.al., Science Vistas 7, Don Bosco Pres, Inc., Makati City, 2013 Pavico Josefina Ma. Ferriols Et.al,Exploring Life Through Science, PHOENIX Publishing .,Quezon City, 2012
Answers Key Activity 1: 1. SUBSTANCE 2. MIXTURE 3. SUBSTANCE 4. MIXTURE 5. MIXTURE
6. SUBSTANCE 7. SUBSTANCE 8. SUBSTANCE 9. MIXTURE 10.SUBSTANCE
Guide Questions 1. Mixture have 2 or more components while substance has definite composition 2. Answers may vary Activity 2: UNDERLINED Blood Soil Milk Rocks Mayonnaise Combine
ENCIRCLED Gold Aluminum Element Sucrose Chlorine Pure Fixed
Guide Questions: 1. There are 6 words for mixture and 7 words for substance. 2. Answer may vary. Based on the properties of mixture and substance. Practice Personal Hygiene protocols at all times.
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3. Yes. Distillation and filtration Activity 3: Mixture Made up of 2 or more components Components may be separated or recovered Homogenous Heterogeneous Similarities May be solid, liquid and gas Matter Substance Definite composition Element Compound containing only one type of particle
Activity 4: Images
Substance
Mixture
√
√
√
√
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√
√
√
√
√
√
Activity 5: Properties Substance It is a compound It cannot be separated by physical means It is not a combination of two or more substance It cannot be combined chemically Elements and compound are both example Practice Personal Hygiene protocols at all times.
Mixture is a combination of two or more substance It can be an example of a solution It can be separated by physical means With two types homogeneous and heterogeneous 35
Activity 6: 1. FACT 2. BLUFF 3. BLUFF 4. BLUFF 5. FACT 6. BLUFF 7. FACT 8. FACT 9. BLUFF 10. FACT
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Prepared: JOSEPHINE D. ANTONIO MARIBEL S. ADDAUAN Writers Cabulay High School
SCIENCE 7 Name: _________________________ _________________________________ ______________ ______ Section: _______________________ _______________________________ ______________ ______
Grade Level: _____________ _____________ Date: ___________________ ___________________
LEARNING ACTIVITY SHEET Properties of Solutions Background Information for Learners A solution has two components; the solute and the solvent. A component present in small amounts is called solute and the component present in greater amount is called solvent solute and solvent.. The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solute and solvents may be solid, liquids, or gases.
Learning Competency with Code Investigate properties of unsaturated or saturated solutions (S7MT-1c-2 (S7MT-1c-2). ).
Activity 1: SOLUTE OR SOLVENT? below. Directions: Identify the solute and the solvent in the given solutions below. Directions: Solution
Solute
Solvent
Salt water
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Coffee
Orange Juice
Soft drinks
Mud water
Activity Activit y 2: SATURATED AND UNSATURATED SOLUTIONS Directions: We use solutions every day. People who wear contact lenses use “lens solution” to Directions: We rinse their contacts and keep them wet. Athletes who consume sports drinks after exercising benefit from the electrolytes in those those solutions. This activity will explore whether whether or not there is a limit li mit to how h ow much of one substa substance nce can dissolve in another. Write your answer on on the table. UNSATURATED SOLUTIONS
A. All beakers contain 10.0 g of water.
BEAKER A
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BEAKER B
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B. All beakers are kept at 20 °C. C. All solutions are stirred for 2 hours. D.
Solute
is
the
same
substance in all beakers. beakers.
Number particles
of
dissolved
5
Number of solid particles
0 SATURATED SOLUTIONS
A. All beakers contain 10.0 g of water.
BEAKER C
BEAKER D
7 grams of solute added
9 grams of solute added
B. All beakers are kept at 20 °C. C. All solutions are stirred for 2 hours. D. Solute is the same substance in all beakers. beakers.
Number particles
of
dissolved
Number of solid particles
18
17
Activity 3: PICTURE PERFECT! Directions:: Examine picture A and picture B. Answer briefly the guide questions. Directions
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A
B
GUIDE QUESTIONS: 1. Which picture is a saturated solution? How do you describe a saturated solution?
2. Which picture is unsaturated solution? How do you describe unsaturated solution?
3. How can you change a saturated solution to unsaturated solution?
Activity 4: GUESSING GAME! Directions: Consider the beakers below. Answer the questions in the table. Directions: Beaker A
Beaker B
Beaker C
Beaker D
Which beakers represent re present SATURATED SOLUTIONS? SOLUTIONS? Which beakers represent re present UNSATURATED SOLUTIONS? SOLUTIONS?
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Reflection What I have learned about saturated sat urated and unsaturated solution? _____________________ __________ ______________________ ______________________ ______________________ ______________________ ____________________ _________ _____________________ __________ ______________________ ______________________ ______________________ ______________________ ____________________ _________ _____________________ __________ ______________________ ______________________ ______________________ _____________ __
References Online Resources https://xaktly.com/Images/Chemistry/Concentration/ConcentrationIntroSchematic.png https://www.google.com/url?sa=i&url=https%3A%2F%2Feschool.iaspaper.net%2Fwhat-isconcentrated-solution%2Fwhat-is-concentratedsolution%2F&psig=AOvVaw2lzFq2vyRAejXy4IrRsFtY&ust=15 solution%2F&psig=AOvV aw2lzFq2vyRAejXy4IrRsFtY&ust=1591364896194 91364896194000&source 000&source =images&cd=vfe&ved=0CAIQjRxqFwoTCPDF583v6ekCFQAAAAAdAAAAABAI https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.clickthecity.com%2Fpartne rs%2Fmcdelivery%2Fitem%2F52%3Fid%3D52&psig=AOvVaw0 rs%2Fmcdelivery%2Fitem%2F52%3Fid %3D52&psig=AOvVaw0hLV5A18k5ZbpthVV hLV5A18k5ZbpthVVNA NA 4zA&ust=1591366146040000&source=images&cd=vfe&ved=0C 4zA&ust=1591366146 040000&source=images&cd=vfe&ved=0CAIQjRxqFwoTCICmy5 AIQjRxqFwoTCICmy5z0 z0 6ekCFQAAAAAdAAAAABAD https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.pxfuel.com%2Fen%2Fsear ch%3Fq%3Daqua&psig=AOvVaw1l5ryfONce_Akk8Q70UY ch%3Fq%3Daqua&psig=AOv Vaw1l5ryfONce_Akk8Q70UYrR&ust=1591366243598 rR&ust=1591366243598000& 000& source=images&cd=vfe&ved=0CAIQjRxqFwoTCICjxcj06ekCFQAAAAAdAAAAABAD https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.wallpaperflare.com%2Fsea rch%3Fwallpaper%3Dsoftdrink&psig=AOvVaw1ld0JJfCAOyMlH1fDNh9_G&ust=159136 6410015000&source=images&cd=vfe&ved=0CAIQjRxqFwoTC 6410015000 &source=images&cd=vfe&ved=0CAIQjRxqFwoTCOCX3Z_16ekCFQA OCX3Z_16ekCFQAAAA AAA AdAAAAABAD https://www.google.com/url?sa=i&url=https%3A%2F%2Fcommons.wikimedia.org%2Fwiki %2FFile%3AMud_and_water_suspension_and_clear_water.JPG&psig=AOvVaw3D2EIj4zg vh8yOvlmAYKQ2&ust=159136655 vh8yOvlmAYKQ 2&ust=1591366558436000&source=images&cd=vfe&ved=0CAIQjRxqF 8436000&source=images&cd=vfe&ved=0CAIQjRxqF woTCKipquP16ekCFQAAAAAdAAAAABAD https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.sciencephoto.com%2Fmedi a%2F562080%2Fview%2Fbromine-inwater&psig=AOvVaw26MOZurzU3_EQ4rojTlgBD&ust=15913669 water&psig=AOvVaw26MOZurzU3_ EQ4rojTlgBD&ust=1591366955836000&so 55836000&source=ima urce=ima ges&cd=vfe&ved=0CAIQjRxqFwoTCPDgmqL36ekCFQAAAAAdAAAAABAY https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.sciencephoto.com%2Fmedi a%2F945449%2Fview%2Fbromine-test-foralkenes&psig=AOvVaw26MOZurzU3_EQ4rojTlgBD&ust=15913 alkenes&psig=AOvVaw26MO ZurzU3_EQ4rojTlgBD&ust=1591366955836000 66955836000&source=i &source=i mages&cd=vfe&ved=0CAIQjRxqFwoTCOCvuPb36ekCFQAAAAAdAAAAABAQ
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Answer Key Key Activity 1 Solution
Solute salt
Solvent water
Salt water Coffee granules
water
Orange juice powder
water
Carbon dioxide
water
Mud
water
Coffee
Orange Juice
Soft drinks
Mud water Activity 2 UNSATURATED: Number of Dissolved Particles= 5,10 Number of Solid Particles= 0,0 SATURATED: Number of Dissolved Particles= 18,18 Number of Solid Particles= 17,27 Activity 3 1. A. A solution is saturated when no more solute dissolves. dissolves . 2. B. An unsaturated solution contains less than the maximum amount of solute that is capable of being dissolved. 3. By heating the solution a saturated solution can be changed into an unsaturated solution. The simplest way also is to add more solvent. solvent.
Activity 4 Which beakers represent SATURATED SOLUTIONS? B, C Which beakers represent UNSATURATED SOLUTIONS? A, D D Practice Personal Hygiene protocols at all times.
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Prepared by:
MARIBETH C. PERICO Writer
SCIENCE 7 Name: _____________ ____________________ _____________ _____ Section:_________________________ _______________________ ________________________________ ______________ _____
Grade Level: _____________ Date:___________________ Date:_______________ ____
LEARNING ACTIVITY SHEETS Concentrations of Solutions Background Information for Learners You had learned from your previous lesson the properties of a solution. You were able to find out that a solution is formed when a solute is added iin n a solvent forming a single phase that appears uniform throughout. Solutions may come in solids, liquids or gas depending on its solute and solvent. The concentration of a solution tells the quantity of solute present in a given solvent. A solution that contains a very small amount of solute is classified as diluted solution while a solution that contains a large amount of solute is classified as concentrated solution. Concentrations of solutions can be described qualitatively and quantitatively. Qualitative description is simply observing the appearance of the solution while quantitative description gives the exact amount of solute and solvent present in the solution. It can be expressed in percent by mass and percent by volume.
Learning Competency with Code Express concentrations of solutions quantitatively by preparing different concentrations of mixtures according to uses and availability of materials (S7MT-Id-3 (S7MT-Id-3). ).
Activity 1: WORD MATCH Practice Personal Hygiene protocols at all times.
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Directions: Match the statements described in i n column A to the words in column c olumn B. Write the letter of your answer on the space provided. COLUMN A 1. It contains small amount of dissolved solute in a given amount of solvent.
COLUMN B a. solvent
2. The component of a solution that component. comes in smaller smal ler b. concentrations amount as compared to the other 3. It describes the relative amount of solute and solvent in a given volume of solution.
c. diluted
4. A solution that contains a large amount of dissolved solute for a certain volume of solvent.
d. solute
5. It is the dissolving medium in a solution.
d. concentrated
Activity 2: RIGHT OR WRONG? Directions: Write T if the statement is True and write F if the statement is False. _____1. Concentrations of solutions depends depends on the amount of so solute lute present in the solution. _____2. Adding Adding more water to a concentrated solution will affect its concentration. _____3. Vinegar labeled as 5% acidity is considered a diluted solution. solution. _____4. Commercial muriatic acid needs to be diluted before before use. _____5. A 70% 70% ethyl alcohol solution is a better than a 40% solution. _____6. A solution that contains a very large amount of solute is classified as diluted solution. solution.
Answer the following questions briefly. 1. Why is it important to know the concentration of solutions that you used or buy? ______________________ ___________ ______________________ ______________________ _____________________ _____________________ _____________________ __________ ______________________ ___________ ______________________ ______________________ _____________________ _____________________ _____________________ __________ ______________________ ___________ ______________________ ______________________ ______________________ ______________________ ____________________ _________ ______ 2. How would you lower the concentrations of solutions? ______________________ ___________ ______________________ ______________________ _____________________ _____________________ _____________________ __________ ______________________ ___________ ______________________ ______________________ _____________________ _____________________ _____________________ __________ ______________________ ___________ ______________________ _______________________ ______________________ _____________________ ____________________ _________ ______
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Activity Activit y 3: PERCENTAGE MASS Percent by mass expresses the concentration of a solution in terms of the mass of solute in grams to the mass of the solution. For example, a salt solution of 10% concentration means that for every 100 grams of the solution it contains 10 grams of salt and 90 grams of water. Percent by mass can be computed using the equation: % mass =
x 100%
Directions: Study the given problems and solve what is being asked for. Directions: Study 1. A solution contains 5 grams of salt and 195 grams of water. A. How many grams of solution are are present? present?
B. What is the percent by mass concentration of the solution? 2. A sugar solution has a mass of 500 grams. The solution contains 200 grams of sugar. A. How many grams of water is used in the solution?
B. What is the percent by mass concentration of the solution?
3. Sodium acetate is a compound that readily dissolves in water. How much sodium acetate should you used in 135 grams of water to produce a 25% solution?
Activity 4: PERCENTAGE VOLUME The concentration of liquid solute and liquid solvent like that of rubbing is expressed in percent by volume. A 70% rubbing alcohol solution contains 70 ml of isopropyl alcohol and 30 ml water in a 100 ml volume of the solution. You can compute for the percent by volume using the equation: % volume =
x 100%
Directions: Complete the given table. Directions: Complete Practice Personal Hygiene protocols at all times.
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Volume of solute (Isopropyl Alcohol)
Volume of solvent (Water)
40 ml
60 ml
25 ml
175 ml
Volume of solution
8 ml
Concentration (Percent by volume)
50 ml 250 ml 376 ml
70 %
400 ml
Answer the following questions briefly. 1. Which concentration is best to buy? Why ______________________________ _______________________________________ _________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________
Activity 5: DRINK MODERATELY Alcoholic beverages like wines and liquors are solutions containing ethyl alcohol as the active ingredient. They are expressed in percent by volume. Directions: Answer the given questions using the given table. Directions: Answer Sample 1 2 3 4
Concentration of Alcoholic Beverages 15% 38 % 5% 40 %
1. Which sample has the highest alcohol content?
2. Which sample has the least alcohol content?
3. If a person consumes 150 ml of sample 4, how much ethyl alcohol did he consume?
4. If person A drinks 300 ml of sample 3 and person B drinks 180 ml of sample 2, which person consumes more alcohol?
5. Is alcoholic drink good to your health? health? Why? Practice Personal Hygiene protocols at all times.
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REFLECTION: What I have learned in the activities? _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ ______________________ ______________________ ______________________ _____________________ __________ _____________________ ___________ _____________________ _______________________ _______________________ ______________________ ____________________ _________ _____________________ ___________ _____________________ _______________________ _______________________ ______________________ ____________________ _________ ____
REFERENCES Printed Resources: Books Department of Education, Science and a nd Technology I: Integrated Science, Pasig City, Philippines: Instructional Materials Council (Department of Education), 2013 Diwa Learning System Inc., Science for the 21 st Century Learner, Makati City, Philippines, 2015 Online Resources: Websites https://www.concreteconstruction.net https://www.thgoughtco.com https://chem.libretexts.org https://chem.libretexts.org
Answer Key Activity 1 1. C C 2. D 3. B 4. E 5. A Activity 2 1. T 2. F 3. F 4. T 5. T 6. F 1. It is important to know the concentrations of solutions to be able to t o use and handle them properly. Also to avoid misusage of these solutions. 2. The concentration of a solution is lowered by adding more solvent or water. Practice Personal Hygiene protocols at all times.
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Activity 3 1a. 200 grams 1b. 2.5 % 2a. 300 grams 2b. 40 % 3. 60 grams Activity 4 Volume of solute (Isopropyl Alcohol)
Volume of solvent (Water)
Volume of solution
40 ml 25 ml 8 ml 175 ml 24 ml
60 ml 175 ml 42 ml 75 ml 376 ml
100 ml ml 200 ml 50 ml 250 ml 400 ml
Concentration (Percent by volume) 40 % 12.5 % 16 % 70 % 6%
Activity 5 1. Sample 4 2. Sample 3 3. 60 ml 4. Person B (68.4 ml) 5. No, because alcohol affects different parts of the body particularly the brain and the liver which may lead to diseases like cancer of the liver and permanent paralysis of some brain cells.
Prepared by: WILMA C. ZAMORA Writer
Practice Personal Hygiene protocols at all times.
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Practice Personal Hygiene protocols at all times.
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