Republic of the Philippines BULACAN AGRICULTURAL STATE COLLEGE Institute of Education, Arts and Sciences San Ildefonso, Bulacan
Detailed Lesson Plan in Chemistry for Grade 8
Time Frame: 4:00-5:00 ( 1 Session ) August 4, 2014 I.
OBJECTIVES: At the end of the lesson, the students are expected to: 1. define colloids. 2. identify some properties of colloids. 3. cite application of properties of colloids.
a. Topic: Colloids b. References: b.1 Exploring Life Through Science by: Bayquen, Aristea V. pp: 270-276 b.2 General Science by:Tan, Nora A. pp:1 54-159 b.3 Science And Technology by: Torres, Myrna M. and Dading T. Mandalo pp: 40-45 c. Materials: For teacher: laptop, projector, visual aids For students: reference book, yellow paper, ballpen d. Teaching Strategies: Discussion and Collaborative learning
Teacher’s Activity a. Daily Routine a.1 Greetings Good Morning Class a.2Prayer Let us pray first. a.3 Conditioning of the room Please pick up the pieces of paper under your desk and make sure that your chair is aligned in the row.
Good Morning Ma’am. (one of the student will lead the prayer ) (students will pick up the pieces of paper and check the alignment of their chairs)
a.4 Checking of Attendance Say present as I call your name. Class, how was your day? That’s good, today we will about to discuss what colloid is, identify some of its properties and cite application of those properties. b. Review of Previous Lesson But before we open the new topic, let us have a sort of review of our yesterday’s lesson. Class, can you discuss what mixture is?
Exactly, that’s correct! Is halo-halo a mixture? How about air? Very good class! Give yourselves a Wow Galing Clap.
(students will say present as the teacher call their names) It was great, Ma’am.
Mixtures are made up of two or more components substances that can be separated through physical means. Yes Ma’am! Definitely Ma’am! (students will clap)
c. Motivation I have prepared here a video clip regarding our next topic, I want you to watch intellectually. Class, what have you observe? A scattering of light between solution and colloids. Very good observation! What do we call to that phenomenon? Ma’am its Tyndall effect. Excellent! d.
Presentation of the Lesson Now, let’s start with our new lesson. Can you give any idea about colloids?
Very well said. Can you give some example of it? Very good class! All of your answers are correct. How about cloud? Is this a colloid? Absolutely, that’s good! What about charcoal? Class, charcoal is a colloid. Now class, can you identify some properties of colloids?
A colloid is a heterogeneous mixture with particles bigger than the particles of a solution but smaller than those of a suspension. (students will answer milk, jelly, gelatin and leche plan)
Yes Ma’am! No Ma’am! Tyndall effect or the scattering of light in a colloid producing a visible beam of light.
Exactly! Who can give another property?
How about adsorption? Very well said! Ok class, can you give at least three application of properties of colloids?
Brownian movement or the erratic, random motion of the colloidal particles creating a zigzag random motion. Adsorption is the bending in thin layer of molecules to the surfaces. The suspension of pollen grains in water produces Brownian movement that helps us understand the behavior of molecules. The significance of using charcoal in making gas masks. The brilliant colors at sunset and the blue color of the sky and the sea are caused by the thick layer of small particles and molecules in the atmosphere and in the sea.
Very good class! All of your answers are correct! e. Generalization: Colloid is a mixture with particles that are larger than those found in true solutions but smaller than those in suspensions. Some properties of colloids are tyndall effect, Brownian movement, and adsorption. Charcoal is can be used in gas masks because of its properties called adsorption. f. Application: How important is the study of colloids? IV.
EVALUATION: Identify what is asked in each sentence. _________1. The scattering of light in a colloid producing a visible beam of light. _________2. The erratic, random motion of the colloidal particles creating a zigzag random motion. _________3. Properties best explain why charcoal is used in making gas masks. _________4. A mixture with particles that are larger than those found in true solutions but smaller than those in suspensions. _________5. The component where another one is suspended in it.
ASSIGNMENT: Make an advance study of the next topic: a. grouping of colloids. b. purification of colloids. reference: Science and technology by: Amelia P. Mapa pp. 324-329
PREPARED BY: Ruth B. Angeles BSE IIIPS SUBMITTED TO: Mrs. Ma. Krisvie Abigale F. Mendoza