2. •Encircle the letter of the correct answer.
1. Why are additives used in foods? Because they _________.
A. preserve food C. add vitamins to the food
B. make the food sweet D. improve the flavor and color of food
2. Ginisa mix adds taste to food like tinola. Ginisa mix is a kind of _________.
A. Additive B. Preservative C. Disinfectant D. Antiseptic
3. Why is citric acid added to juice drink preparation? Citric acid
______________.
A. makes the juice drink last longer C. dissolves the solid
B. provides sour taste D. provides red color
4. Why paints are usually applied on the outer surface of walls? Paints
_________.
A. protect the wall from the harmful effects of heat and rain
B. make homes attractive
C. deodorize homes
D. both a and b
5. Why are pesticides used by farmers? It is used to ________________.
A. destroy plant pests C. kill harmful weeds
B. decrease crop yield D. both a and b
3. 6. Why are thinner and turpentine added to paints? They __________.
A. give color to paints
B. remove mold in paints
C. hold pigment particles together
D. make paints easy to spread on surfaces
7. Which of the following additives will best give color to kare-kare?
A. red food color B. achuete seeds C. salitre D. sugar
8. Here are some things Aling Cora does to meat. Which of these will NOT
slow down the spoiling of meat?
A . Drying C. Soaking the meat in water
B. Salting D. Storing the meat in the freezer
9. How can ordinary glass be made heat resistant? By adding _________
A. zinc to the glass C. magnesium to the glass
B. boric oxide to the glass D. cyanide solutions to the glass
10. How is the capsule form of drugs better than the tablet form? It is
_________.
A. Attractive
B. less in weight
C. less in volume
D. more efficient because it dissolves in the target area
4. 11. Antibiotics are now made inside degradable plastic capsule that dissolve slowly in
the stomach and intestines. This is done by ________
A. Heating
B. Melting
C. lamination
D. using a special material affected by digestive juices
12. How did the improvement of materials by technology help people? They
_________________
A. make life easier and more comfortable
B. protect people from harm
C. help prepare food
D. all of these
13. What material causes the destruction of the ozone layer?
A. Chlorofluorocarbons C. Manganese Oxide
B. hydrochloric acid D. Carbon dioxide
14. What may occur as a result of the release of so much gaseous wastes particularly,
carbon dioxide in the atmosphere?
A. Global cooling C. Euthrophication
B. Global warming D. Flooding
15. Why is acid rain harmful? Acid rain is harmful because it can _______
A. contaminate water supply and corrode some materials
B. make the surroundings hot
C. bring about drought
D. bring lots of rain
5. 16. Why are clams and mussel banned from consumption when red tide
occurs? Because they __________.
A. cause paralysis or death when eaten C. can multiply very fast
B. have no nutritional value D. both a and b
17. In what way is a pressure cooker useful/beneficial?
A. It is durable. C. It lessens cooking time.
B. It can cook more food. D. It can make food taste better.
18.Which statement is true?
A. Energy increase in the passage of time.
B. Energy can be destroyed.
C. Energy is conserved.
D. Energy can be lost.
19. How can white clothes be made whiter? It can be made whiter
by_________
A. Eating B. ironing C. bleaching D. vulcanizing
20. Why is fermentation beneficial to man? Fermentation _________.
A. enables frying pan to achieve a non-stick finish
B. produces vinegar, wine, and fish paste
C. removes stains from clothes
D. makes raw rubber softer
6. 21. Why should one wash his hands thoroughly after using insecticides?
A. To transfer harmful effects on insecticides to the water.
B. To remove traces of poison.
C. To avoid plant contamination.
D. both B and C
22. What should you do to avoid taking poisonous materials by mistake?
A. Reread labels of materials or products before taking them.
B. Separate poisonous substances from food items.
C. Label poisonous substances properly.
D. All of the above.
23. Which are non biodegradable?
•vegetable and fruit peeling II.tin cans, broken glasses
III. Styrofoam food containers IV. plastic and rubber slipper
A. I only B. II only C. I, II, III D. II, III, IV
24. All of the following describe proper practices in using/disposing materials at home
EXCEPT
A. Always smell and taste materials before using them
B. Covering one's nose when spraying insecticides
C. Keep petroleum products in safe containers
D. Read labels before using chemical products
25. You must NOT read labels of chemicals like medicines, insecticides and pesticide
before using them?
A. True B. False C. Maybe D. None of these
7. 26. Poisonous substances must be kept in tightly covered containers and away from
the reach of children.
A. True B. False C. Maybe D. None of these
27. Too much carbon dioxide in the atmosphere prevents heat from escaping into the
outer space. This makes the earth _________?
•A. lighter than it used to be C. colder than it used to be
B. heavier than it used to be D. warmer than it used to be
28. What happens to the energy possessed by a person when he uses it in doing
work?
A. It is converted to light energy
B. It is changed into radiant energy
C. It is transformed into chemical energy
D. It is transformed into mechanical energy
29. What happens to heat produced during energy transformation? Heat __________.
A. is changed to radiant energy C. is transferred to the environment
B. escapes into the outer space D. is absorbed by the heated object
30. Your mother shopping at the supermarket finds difficulty pushing the cart loaded
with groceries. Why is it difficult to push a cart loaded with groceries than when it is
empty?
A. An unbalanced force is needed to move a loaded cart
B. Equal force is needed to move loaded cart and an empty cart
C. Less force is needed to push a cart loaded with groceries because of its wheels
D. More force is needed to push loaded cart since it has more mass than when it is
empty
8. 31. Which of the following indicates velocity?
A. bicycle stopping at northeast point C. Ferry boat sailing on the sea
B. a car moving 80km/hr to the east D. a speeding car
32. What form of energy is primarily produced by photosynthesis in green
plants?
A. Electrical B. mechanical C. chemical D. nuclear
33. Which of the following proves that matter is made up of particles?
A. chocolate added to water diffuses or scatters in the liquid
B. expansion of gas in a balloon makes it larger
C. spreading of odor
D. all of the above
34. How are particles in a block of wood arranged?
A. closely packed together C. very far apart
B. very, very far apart D. far apart
35. How do atoms differ from molecules? Atoms are ___________
A. bigger than molecules
B. smaller than molecules
C. may or may not be bigger than molecules
D. may or may not be smaller than molecules
9. 36. Anything that occupies space and has mass.
A.Substance B. Particle C. Matter D. Molecules
37. Which of the following illustration is the model of liquid?
A. B. C. D.
38. What form of energy does food provide the human body?
A.Mechanical B. chemical C. electrical D. nuclear
39. What form of energy is produced when the strings of a guitar are plucked?
A.Mechanical B. chemical C. radiant D. sound
40. What form of energy does a running motor produce?
A. Chemical B. electrical C. mechanical D. nuclear
10. 41. Why can the sun give off tremendous amount of solar energy? It can give off
tremendous amount of energy because _________.
A. rays of the sun continue to glow
B. nuclear energy is locked up when atoms split
C. it contains millions of nonmoving, unreacting atoms
D. energy is released when the sun's atom combine/split
42. How is chemical energy stored in food used by the human body? It is used for
__________.
A. Growth C. growth and development
B. Fattening D. increasing body weight only
43. What is one way by which physicians determine a healthy pair of lungs? By using
__________.
A. video machine B. microscope C. camera D. x-ray
44. Why is nuclear fusion less harmful than nuclear fission? It is less harmful because
nuclear fusion ___________.
A. produces very little radioactivity and less dangerous waste products
B. has an abundant supply of radioactive wastes
C. can supply energy to homes
D. None of the above
45. What energy transformation does a blender or mixer show?
A. mechanical energy to electrical energy
B. electrical energy to mechanical energy
C. mechanical energy to chemical energy
D. thermal energy to mechanical energy
11. 46. Which of the following does not show the transfer of energy from one body
to another?
A. eating corn on a cob
B. placing a spoon in a cup of hot coffee
C. lighting a room with a fluorescent lamp
D. placing a cup of frozen cream in a freezer
47. What is always produced when there is energy transformation?
A. light B. heat C. chemical D. electrical
48. What happens to heat during energy transformation? Heat is __________.
A. changed to radiant energy
B. escapes into the outer space
C. reabsorbed by the heated object
D. absorbed by the surrounding environment
49. How is nuclear energy produced? It is produced through __________.
A. the combination of a heavier atom with a lighter atom
B. the splitting apart of nucleus
C. bombardment of atoms
D. both A and B
50. Based on the graph of the race, who is the winner, A, B, C, or D?
