Fourth Periodical Test in Science 8

FOURTH PERIODICAL TEST IN SCIENCE 8

Name: _________________________________ _______________ ________________________________ ______________

Date:____________________ Date:___ _______________________ ______

Grade 8 – ___________________ _____________________ __

Score:

/ 80 =

%

I. Short Answer Questions: Fill out your answers on the space provided in each number. For items 1 – 5, 5, refer to the diagram below and answer the following questions:

1. If the fox will become the primary consumer, the energy absorbed will __________________ ____________________. __. 2. The amount of energy that the primary consumer takes is ________________ ________________ from what the producers have. 3. Energy ______________ ______________ from one trophic level to another because of their own energy co nsumption. 4. From the figure, there is only a _________________ path of energy. 5. Wild bears are known to be the ____________________ ____________________ consumers. For items 6 – 10, 10, refer to the figure below and answer the following questions:

6. How can the plants in the area partake in the cloud formation? _______________________ ______________________________ _______ 7. In a cloudy day, can evaporation still take place? Explain concisely. __________________ ____________________________ _________________ _______ 8. Clouds can return the evaporated water through a process called ________________________ _____________________________. _____. 9. As plants are ar e converted into ammonia, it is converted to ___________________ ___________________ through nitrification. 10. The atmospheric nitrogen is converted by nitrogen fixing –soil bacteria to ___________________. ___________________. II. Multiple Choice: Choose the letter of the correct answer answer from the choices provided provided in each question. Write your answer in uppercase form on the space provided before each number.  _____ 1. The following terms, except one, have something to do with the base of a food pyramid. A. producer

B.

shelf fungus

C.

photosynthesis

D. decomposer

 _____ 2. Symbiosis is best demonstrated in A. B. C. D.

fishes and aquatic plants. herons and carabaos. tobacco flowers and honey bees. termites and cellulose-eating flagellates.

 _____ 3. Which of the following best describes the simple phenomenon of eating and being being eaten? A. food web

B.

food pyramid

C.

food chain

D.

food trophics

 _____ 4. In here, energy is obtained by transferring chemical energy of inorganic molecules to chemical energy of organic molecules. A. photosynthesis

B.

chemosynthesis

C.

hydrosynthesis

D. glucosynthesis

 _____ 5.In energy pyramids, as the trophic level increases, the energy A. decreases.

B.

increases.

C.

is not affected.

D.

is decomposed.

 _____ 6. How are organismic materials returned back to the nonliving world? A. via respiration

B. via decomposition C.

none of the above D.

both a and b

 _____ 7. This is the ecological relationship showed by a dog dog and a tick. A. parasitism

B. mutualism

C.

commensalism

D. predation

 _____ 8. This is the ecological relationship showed by a Philippine Philippine eagle and a farm rat. A. parasitism

B. mutualism

C.

commensalism

D. predation

 _____ 9. This is the ecological relationship showed by a butterfly butterfly and a flower. A. parasitism

B. mutualism

C.

commensalism

D. predation

 _____ 10. This is the ecological relationship showed by a sea anemone and a pandaca pandaca pygmea. A. parasitism

B. mutualism

C.

commensalism

D. predation

C.

stomach.

D.

large intestine.

D.

ruglin

 _____ 11. Starches begin to be digested in the B. oral cavity.

B.

esophagus.

 _____ 12. This chief digestive enzyme is needed to break down protein. A. guafenisin

B.

pepsin

C.

pylorin

 _____ 13. The deep folds of the stomach wall that allow for size changes of a stomach are are called B. rugby.

B.

sphincter.

C.

rugae.

D.

glottal folds.

C.

chyme.

D.

mastion.

 _____ 14. A ball-like mass of food is called a B. bolus.

B.

wad.

 _____ 15.This is the loose layer of connective tissue that can be only found in in the esophagus. B. mucosa

B.

adventitia

C.

serosa

D. muscularis externa

gastrin.

D.

renin.

small intestine

D.

stomach

 _____ 16. Gall bladder activity is caused by the hormone B. secretin.

B.

cholecystokinin.

C.

 _____ 17. This is the largest glandular organ in the body. B. liver

B.

large intestine

C.

 _____ 18. The muscle action that mixes chime and digestive juices is A. peristalsis

B. mastication

C.

segmentation

D. digestion

 _____ 19. This is considered as the vestigial organ in our body. A. pancreas

B.

rectum

C.

gall bladder

D. appendix

 _____ 20. The procedure of forming a new opening in our colon for healing or surgical repair. A. colostomy

B.

colopenia

C.

coloscopy

D. colotomy

 _____ 21. Externally, the three main structural parts of a tooth are the A. B. C. D.

enamel, gingival, and apical foramen. crown, cementum, and periodontal ligament. dentin, neck, and pulp. crown, neck, and root.

 _____ 22. All but one is a colon segment in the alimentary canal: E. F. G. H.

transverse colon ascending colon descending colon absorbing colon

 _____ 23. The components of the gastrointestinal system work together to perform the following general steps:

1. ingestion A. B. C. D.

2. digestion 3. secretion 3.  secretion 4. excretion 6. absorption 7. respiration

5. mastication

7, 1, 5, 2, 3, and 4 1, 5, 3, 2, 7, and 6 1, 5, 2, 3, 6, and 4 5, 1, 2, 3, 4, and 7

 _____ 24. From the steps indicated in item no. 13, the activity that does not belong to the group is A. B. C. D.

7. 4. 3. 1.

 _____ 25. This/these is/are the tooth type(s) responsible for crushing and grinding food. A. B. C. D.

canine tooth cuspid tooth. both a and b none of the above

For items 26 – 30, 30, refer to the case below:

A patient was rushed in the emergency department around 3 o’ clock in the morning  because of a severe burning sensation in his chest. The patient is conscious and thinks that he is having a heart attack. He told the nurse-on-duty that he ate a large volume of food before he felt the burning sensation. The nurse-on-duty immediately immediately relayed the information to the resident-onduty.  _____ 26. From the case scenario given, the problem might be due to A. B. C. D.

malabsorption syndrome. pancreatitis. reflux esophagitis. peptic ulcer.

 _____ 27. The physiologic process that is malfunctioning malfunctioning based from the situation above is A. B. C. D.

mastication. secretion. digestion. absorption.

 _____ 28. What could be the possible cause of the “burning” sensation? A. B. C. D.

build-up of gastric juices regurgitation of ingested food erosion of abdominal mucosal lining inappropriate water usage of colon

 _____ 29. What suggestion can you make to the patient to prevent the recurrence of burning episodes? A. B. C. D.

The patient should limit his water intake. The patient should chew his food well and should eat slowly. The patient should eat only as much as his body can burn. The patient should take at least eight glasses of water per day.

 _____ 30. Which of the following medications can ease the pain that is experienced by the patient? A. B. C. D.

analgesics antipyretics antibiotics antacids

III. Modified True or False: Write TRUE if the statement is correct and if the statement is false, false, rewrite the whole statement to make it factual. 1. The nonliving world depends on plants for its carbon supply.  ___________________  _____________________________ ___________________ _________________ _________________ ___________________ ____________________ ___________________ ________________ _______ 2. The processes that normally take place in nature are not disrupted in a balanced ecosystem.  ___________________  _____________________________ ___________________ _________________ _________________ ___________________ ____________________ ___________________ ________________ _______ 3. Decomposers return nutrients from t he biosphere back to the living world through reproduction of organisms.  ___________________  _____________________________ ___________________ ___________________ ___________________ __________________ ___________________ __________________ _______________ _______ 4. An ecosystem’s prey population in equilibrium is somewhat affected by the lifeless predators in the area.

 ___________________  _____________________________ ___________________ _________________ _________________ ___________________ ____________________ ___________________ ________________ _______ 5. The size of a particular predator population can increase beyond what its prey population can support.  ___________________  _____________________________ ___________________ _________________ _________________ ___________________ ____________________ ___________________ ________________ _______ For items 6– 10  10   ,

identify the missing word that will complete complete the first statement. Jumbled letters letters are provided provided as

clues. Then, examine if the associated statement is true or false. Write TRUE if the second statement is correct and if false, change the sentence to make it factual.

6. A _________________________ _________________________ (obgolicial sepesci) is defined as all populations of organisms that are capable of interbreeding among themselves. It is seldom reproductively isolated from members of other species.  __________________  ___________________________ ___________________ _________________ _________________ ___________________ ______________________ ______________________ ______________ _____ 7. _____________________ _________________________ ____ (Toxaymon) is the science of nomenclature and classification of organisms. Assigning the name of an organism is done before biologists classify them.  __________________  ___________________________ ___________________ _________________ _________________ ______________________ ______________________ __________________ ______________ ______ 8. Taxonomists use the _______________________ _________________________ __ (iltan) language in giving scientific names. The levels of classification refer to the categories kingdom, class, phylum, family, order, genus, and species.  __________________  _____________________________ ____________________ __________________ __________________ ___________________ ____________________ __________________ ______________ ______ 9. ______________________ ______________________ (Cslreha Drinwa) is the father of taxonomy who made Systema Naturalae in 1700.

Yeast, a fungi, belongs to the kingdom proposed by Herbert Copeland which is used in baking.  __________________  ___________________________ ___________________ _________________ _________________ ___________________ ______________________ _____________________ ______________ ______ 10. The classification system is considered to be __________________ _________________________ _______ (ivelgvno). Dogs and humans belong to the same kingdom, phylum and class while differ in order, family, genus, and species.  __________________  ___________________________ ___________________ _________________ _________________ ___________________ ______________________ _____________________ ______________ ______ IV. Modified Matching Type: Match the words in column column BIOLOGY with the appropriate appropriate term in column CELL and find the corresponding example of your answer in co lumn CELL in column CHROMOSOME. Column BIOLOGY

Column CELL

Column CHROMOSOME

1. concerned with the maintenance of the life processes of whole organisms

A. Mitosis

I. Synthesis of RNA

2. the reduction –division phenomena

B. Gametes

II. Four daughter cells

3. aligning of double-stranded chromosomes at equatorial plate

C. Interphase

III. Bone cell

4. the cytoplasmic division phenomena

D. Telophase

IV. Two daughter cells

5. involved in the production of an offspring

E. Metaphase

V. Formation of a cleavage furrow

6. shortening of telomeres

F. Somatic Cell

VI. Fifty cell division

7. the nuclear division phenomena

G. Multinucleated Cell

VII. Sperm cell

8. repeated nuclear divisions without cytoplasmic division

H. Meiosis

VIII. Skeletal muscle cell

9. nondividing stage devoted to cell growth

I. Cell Aging

IX. Four double-stranded chromosome

J. Cytokinesis

X. Uncoiling of chromosomes

10. the reverse prophase

Prepared by: Erin Abraham R. Crisostomo BSE –Uniting

“To have a rainbow, you need to have a little rain.” rain.” – Author Unknown