Republic of the Philippines
Department of Education (DepED)
Region VI -Western Visayas
SCHOOLS DIVISION OF GUIMARAS
Email Add: deped_guimaras09@yahoo.com
DESIDERIO C. GANGE NATIONAL HIGH SCHOOL
PRETEST IN SCIENCE 8
QUARTER 1
SY 2022-2023
I. Choose the letter of the correct answer. Write your answers on a separate sheet of paper.
1. In science, a push or a pull of an object is called _____________.
a. force.
b. acceleration.
c. inertia.
d. friction
2. Forces that are equal in magnitude and opposite in direction are known as
a. balanced forces
b. net forces
c. friction forces
d. None of these
3. The force that pulls falling objects toward Earth is called
a. Gravity
b. Free fall
c. Inertia
d. Acceleration
4. A net force (an unbalanced force that changes motion) causes an object to
a. stay at the same speed.
b. not move. c. Accelerate or decelerate
d. None of
these
5. According to Newton’s third law of motion, when a hammer strikes and exerts force on a
nail, the nail
a. creates a friction with the hammer.
b. disappears into the wood.
c. exerts an equal force back on the hammer.
d. Nothing will happen
6. Tom boils some water to make a cup of tea. While the water is boiling the temperature
a. increases.
b. decreases.
c. stays the same.
d. none of these
7. Light that bounces off an object is
a. refracted
b. transmitted
c. reflected
d. amplified
8. Which would light travel through fastest?
a. outer space
b. air
c. water
d. a wall
9. Two people pull on a rope in a tug-of-war. Each pull with a 300 N force. What is the net
force?
a. 0 N
b. 300 N
c. 600 N
d. 900 N
10-14. Choose the best answer from the box below:
a. Isaac Newton
b. Law of Inertia
c. Law of Acceleration
d. Law of Interaction
10. The 3rd Law of Motion
11. The 1st Law of Motion
12. This law states that “ The acceleration of an object is directly proportional to the force
applied and inversely proportional to its mass”
13. The scientist who proposed the “The Three Laws of Motion”
14. This law states that “ A body will remain at rest or move at constant velocity unless acted
upon by an external net or unbalanced force”
15-20 TRUE/FALSE. Write T if the statement is correct and F if it is not.
15. Work is done on an object when the force applied to it covers a distance in the direction of
the applied force.
16. Work is a way of transferring energy
17. The energy of an object enables it to do work.
18. The unit for power is joules per second
19. Stored energy is known as Kinetic Energy
20. Which phenomenon explains why sound is heard at longer distances at night than in day?
a. echolocation
b. reflection
c. refraction
d. reverberation
21. The work done can be calculated as
a. W=Fd
b. F=wd
c. d=fw
d. w= df
22. What measures electric current?
a. Voltmeter b. Thermometer
c. Ammeter d. Rainmeter
23. What is the net force in the figure below?
a. 25 N, to the left
c. 25 N, to the right
b. 195 N, to the left
d. 195 N, to the right
24. An echo occurs when a sound wave is __________.
a. absorbed
b. reflected
c. refracted
d. transmitted
25. What do you call the reflected sound when somebody shouts at close building?
a. density
b. echo
c. reflection
d. refraction
26. Which of the following can separate white light into 7 colors?
a. box
b. cellphone
c. paper
d. prism
27. Which among the colors of the rainbow has the least energy?
a. red
b. green
c. orange
d. violet
28. Which device shouts down when there is overloading in the circuit?
a. fuse
b. voltage source
c. circuit breaker
d. electrical switch
29. Which of the following has the highest energy?
a. red
b. orange
c. green
d. violet
30. What measures the voltage in Electricity?
a. Voltmeter
b. Thermometer
c. Ammeter
d. Rainmeter
“Let all that you do be done in love”
1 Corintians 16:14
Prepared by:
HAZEL MAY P. BAGUHIN
Address: Liningwan, Maabay, Sibunag, Guimaras, 5048
CP No: 092080812007
E-mail: desideriocgnhs@gmail.com/302429.guimaras@deped.gov.ph
Address: Liningwan, Maabay, Sibunag, Guimaras, 5048
CP No: 092080812007
E-mail: desideriocgnhs@gmail.com/302429.guimaras@deped.gov.ph