Republic of the Philippines

Department of Education
NATIONAL CAPITAL REGION
SCHOOLS DIVISION OF PARAÑAQUE CITY
DR. ARCADIO SANTOS NATIONAL HIGH SCHOOL
Km. 15, East Service Road, San Martin de Porres, Parañaque City

PRETEST IN SCIENCE - Grade 8

Name: ________________________________ Date: ________________________

Grade & Section: ________________________ Teacher: _____________________

Directions: Choose the letter of the correct answer, write only the letter on your answer sheet.

1. How does the force affects the acceleration of the body?

A. The greater the force the greater the acceleration.
B. The greater the force there will be no acceleration.
C. The smaller the force exerted, the greater the acceleration
D. The greater the force applied, the smaller the acceleration

2. If you push a shopping cart, it will accelerate. If you push it with double the force, how mucg greater will the
acceleration be?
A. Double C. Quadruple
B. Triple D. No change

3. Trishia whose weight is 500 N is standing on the ground. How much force does the ground exert on her?
A. equal to 5oo N C. more than 500 N
B. less than 500 N D. Any of the above

4. What is the kinetic energy of a 10kg mass having a speed of 5.0 m/s? (Note the equation for kinetic energy is, KE =
½ mv2)
A. 1.25 J B. 12.5 J C. 125 J D. 1,125 J

5. Which of the following energy possessed by an object at rest?

A. Heat energy C. Kinetic energy
B. Mechanical energy D. Potential energy

6. Which situation best illustrates gravitational potential energy?

A. A rolling bowling ball C. A boulder at the top of the cliff
B. An athlete running on a track D. A boy performing jumping jack

7. What do drapes, furniture and carpets do sound waves?

A. absorb B. diffract C. Reflect D. Refract

8. Which of the following is an example of natural source of light?

A. Sun B. Moon C. Laser D. Flashlight

9. What is the movement of the molecules in fluids from higher temperature regions to lower temperature regions?
A. Conduction B. Convection C. Radiation D. Temperature

10. How will an increase in voltage affects the current flowing through a circuit of a certain conductor?
A. The current in the circuit will decrease
B. The current in the circuit will be the same
C. The current in the circuit will also increase
D. It has no effect in the current of the circuit

11. What is the voltage in an electric circuit with the current of 15 A and a resistance of 4.0Ω?
A. 30V B. 60V C. 90V D. 110V

12. The following are the advantages of parallel circuit EXCEPT,

A. Loads are easy to control
B. If one load falls, the other load can still function
C. Large volume of conducting wires will be needed
D. Every load connected in parallel circuits gets an equal amount of voltage

13. Which of the following is NOT a safety device?

A. Fuses B. Double insulation C. Circuit breaker D. Series connection
14. Which statement best describes a normal fault?
A. Fault blocks slide past each other.
B. Compression thrust the fault into reverse.
C. The hanging wall moves upward relative to the footwall.
D. The hanging wall moves downward relative to the footwall.

15. Which of the following is the correct order for the layers of the Earth from the outermost to the innermost?
A. Crust, Core, Mantle
B. Core, Mantle, Crust
C. Mantle, Crust, Core
D. Crust, Mantle, Core

16. Which describes the effect of ground shaking at different locations?

A. Epicenter B. Focus C. Magnitude D. Intensity

17. Which of the following is the best description of the path of P and S waves?
A. P waves and S waves both travel through Earth’s interior
B. P waves and S waves both travels only along the surface of the Earth
C. P waves travels through solids and liquids. S waves travel through solids
D. P waves travels through solids. S waves travels through solids and liquids

18. All of these are correct about seismic waves Except:

A. Seismic waves carry energy
B. Seismic waves travel at different speed
C. Seismic waves can penetrate only through solid
D. Seismic waves enable scientist to understand Earth’s interior

19. All of the statements are correct about typhoon/tropical cyclone EXCEPT;
A. Typhoon forms near the Pacific Ocean
B. The upcoming typhoon cannot be detected earlier
C. Typhoons or tropical cyclones have different categories
D. Typhoon can damage the manmade infrastructure and natural habitat

20. Which of the following instrument is NOT use in monitoring the weather forecast for tropical cyclone?
A. Telescope B. Barometer C. Barograph D. Rain Gauge

21. Which of the following statement is true about the typhoon in the land masses?
A. Typhoon develops in a cold ocean water
B. Typhoon get their energy from the warm oceans
C. When typhoon reaches the landmass wind is blocked by mountains and manmade structures. It decreases its
Speed. This causes the typhoon to become weaker during landfall.
D. All of these

22. Which government agency in the Philippines is responsible for monitoring weather disturbance?
A. PAR B. PAGASA C. PHILVOCS D. None of these

23. In what direction did tropical cyclone Yolanda move?

A. Eastwest B. Southeast C. Northwest D. Southwest

24. What is the average number of tropical cyclones that enters the PAR yearly?
A. 19 B. 20 C. 21 D. 25

25. Why does the tail of the comet always point away from the sun?
A. Because of the solar wind
B. Because of the opposite magnetic forces
C. Because of the magnetic field of the Earth
D. Because you can’t see it pointing toward the sun

26. Why does the tail of the comet always point away from the sun?
A. Because of the solar wind
B. Because of the opposite magnetic forces
C. Because of the magnetic field of the Earth
D. Because you can’t see its pointing toward the sun
27. Which of the following statement is INCORRECT about the particle nature of matter?
A. All matter is made up of tiny particles
B. The particles of matter are always moving
C. The particles have spaces between them
D. Adding heat to matter makes the particles move slower

28. How do atoms move in solid materials?

A. Does not move C. Move through vibrations
B. Move very fast D. Move rapidly

29. Which of the following is an example of physical change?

A. Mixing baking soda and vinegar together, and this causes bubbles and foam
B. A glass cup falls from the counter and shatters from the ground
C. Lighting a piece of paper on fire and the paper burn up and leaves ashes
D. Baking a birthday cake for your mother

30. What happens to the molecules of solid if it is heated?

I. moves closer to each other
II. moves further to each other
III. the structure of solid molecule is still the same
IV. the regularity of the structure of solid molecules changes
A. I and II B. II and IV C. I and III D. I and IV

31. When you mix oil and water, oil floats above water even when they are both liquids. Why?
A. because they have different composition
B. because they have difference in molecules
C. because they have different densities
D. because they have different specific gravity

32. Which of the following is Not evidence of chemical change?

A. Change in color C. Phase change
B. Formation of gas D. Production of precipitate

33. The mass of an atom is primary concentrated at the nucleus, what subatomic particles are part of the nucleus?
A. Electron and Proton C. Protons and Leptons
B. Neutrons and Electron D. Protons and Neutrons

34. How many protons are present in U-235?

A. 92 B. 146 C. 235 D. 330

35. How many neutrons are present in Ni-59?

A. 28 B. 31 C. 59 D. 87

36. How many electrons are present in N-14?

A. 7 B. 10 C. 14 D. 21

37. Which of the following terms refer to the representation of the arrangement of electron in energy levels,
sublevels, and orbitals?
A. Electron Configuration C. Valence Electron
B. Periodic Table D. All of the Above

38. What element has a valence electron of 2p3?

A. Boron B. Carbon C. Fluorine D. Nitrogen

39. What part of digestive system does the chemical digestion of food happen?
A. esophagus B. large intestines C. small intestines D. stomach

40. Which of the following shows an example of mechanical digestion?

A. chewing of food C. removing of feces in the body
B. formation of chyme D. distribution of nutrients

41. Which of the following is the correct sequence in which the stages of mitosis occur after the interphase?
A. anaphase, metaphase, prophase, telophase
B. prophase, anaphase, metaphase, telophase
 C. prophase, metaphase, anaphase, telophase
D. telophase, anaphase, metaphase, prophase
42. How many chromosomes will be found in each of the two new as result of mitotic division?
A. Only one half as many chromosomes as parent cell
B. Twice as many chromosomes as parent cell
C. Three times as many chromosomes as parent cell
D. The same number of chromosomes as parent cell

43. If a certain type of gene masked another gene the resulting trait is said to be ___,
A. dominant B. heterozygous C. homozygous D. recessive

44. Which of the following statement best describes the Biological Species Concepts?
A. Organisms are included in a single species if they share common physical appearance
B. Organisms are included in a single species if they resemble one another
C. Organisms are included in a single species but geographically isolated from one another
D. Organisms are included in a single species if they both have the same function

45. Which of the following shows the correct hierarchical arrangement of organisms?
A. Domain, Kingdom, Class, Phylum, Family, Genus, Species, Order
B. Domain, Phylum, Order, Kingdom, Species, Family, Class, Genus
C. Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
D. Domain, Genus, Phylum, Family, Class, Order, Kingdom, Species

46. How do you describe a food chain?

A. A long chain made of food C. Foods where locked by chain
B. Process of preparing food D. Pathways that energy and nutrients flow through ecosystem

47. Why do all food chains starts with plant?

A. plants are easily grown C. plants can produce their own energy
B. plants are nutritious D. plants do not require energy

48. In the oxygen-carbon dioxide cycle, how do plants use dioxide?

A. To get water C. To make their own food
C. To get rid of wastes D. To break down oxygen

49. Which of the following does not happen when plants have sufficient supply of nitrogen?
A. Become yellowish C. Produce smaller flowers and fruit
B. Do not grow well D. Well-formed flowers and fruit

50. Which of the following my help to maintain healthy environment?

A. Use plastic straws in drinking juice or soda
B. Buy products made from endangered plants and animals
C. Turn on lights, TV, air conditioner, radio when not in use
D. Keep yourself informed. Be aware of and support existing and proposed laws, programs, and project on
Preservation and conservation.