Grade 8 Science Q1 Pre-Test

PRETEST IN SCIENCE 8
Name: _______________________________________
Instruction: Encircle the letter of the correct answer. Any form of erasures is not allowed.
1) Which of the following best describes a force?
A. Push and pull
B. Movement of a certain object in a given frame of reference
C. The sum of magnitude applied to a certain object in a given direction.
D. Both A and C
2) It is sum of the total forces applied to a certain object in a given condition.
A. Net force B. Total Force C. Balanced Force D. Unbalanced Force
3) In what state is the balanced force acquired if the object is not moving or at rest?
A. Equilibrium B. Motion C. Accelerates D. Speeding up
4) Refer to the figure below, what would be the sum of the net force in the given diagram?
A. 5 N
B. 10 N
C. 15 N
D. 20 N
5) What is the acceleration?

A. acceleration = mass x force B. acceleration = force / mass
C. acceleration = mass / force D. acceleration = mass + force
6) Refer to the diagram below. Which box would move faster if both boxes were pushed by the same amount of force?
A. Box A
B. Box B
C. Both A and B
D. None of the above
7) What is the name of the force that keeps an object in circular motion?
A. Centripetal force B. Centrifugal force C. Tension D. Gravity
8) When an action force occurs, the reaction force is always

A. in the same direction as the action force. B. equal and opposite to the action force.
C. applied to the same object as the action force D. equal and the same direction as the action force
9) Newton’s third law of motion describes

A. net force B. centripetal forces C. balance forces D. action & reaction forces
10) As a 500-N woman sits on the floor, how much force does the floor exerts on her?
A. 1000 N B. 2580 N C. 500 N D. 50 N
11) What are the two important factors needed to be considered as a work done?
A. speed and distance B. force and distance C. force and mass D. force and weight
12) Work is a method of transferring __________.

A. force B. direction C. mass D. energy
13) The following samples are work done on an object EXCEPT:

A. a man pushing the wall B. a girl pulling her cart
C. a soccer player kicks the ball D. a falling mango fruit
14) Which of the following is the BEST definition for kinetic energy?
A. The energy of chemical bond B. The energy of object with heat
C. The energy that stored D. The energy of movement
15) In the figure, kinetic energy is being converted into potential energy from __________.
A. point A to point B
B. point B to point C
C. the only energy involved here is kinetic energy
D. energy is not being converted
16) A sound is a form of _________.
A. energy B. volume C. pitch D. temperature
17) What is vibration?

A. how loud a sound is B. how high or low a sound is
C. the loudness or softness of a sound D. the back-and-forth movement of particles
18) Sound is caused by _________.

A. force B. instrument C. vibration D. heat
19) What type of electromagnetic radiation is visible to the human eye?
A. visible light B. infrared waves C. microwaves D. gamma rays
20) What part of the visible spectrum has the highest energy?
A. red B. orange C. green D. violet
21) What happens when white light passes through a prism?
A. The white light will separate into different components of colors

B. The prism will absorb the white light
C. The white light will not change its colors
D. The white light will appear green in color
22) A measure of the average kinetic energy of the particles of a substance is its___________.
A. temperature B. pressure C. force D. volume
23) Which one of the following is a source of heat energy?
A. the sun B. a toaster C. a stove D. all of the above
24) When a popsicle melts, the particles _________.
A. Gain thermal energy and speed up B. Lose thermal energy and slow down
C. There are no particles in popsicles D. Stay the same
25) What is the unit of voltage?

A. Volts B. Watt C. Coulomb D. Ampere
26) What supplies energy in an electric circuit?

A. conductor B. wire C. light bulb D. battery
27) Which diagram below illustrates a parallel connection?
28) What device helps prevent electrical fires?

A. fuse B. double insulator C. receptacle cover D. circuit breaker
29) What is a fuse?

A. another name for switch
B. a protective device to slow down the current
C. a wire with high resistance to prevent current from passing through
D. a protective device for breaking an electric current
30) Why is it important to use these electrical safety devices at home?
A. to make our home safe
B. to lessen the consumption of electricity
C. to protect people from fire and electrocution
D. none of these
- END -

Grade 8 Science Q1 Pre-Test

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PRETEST IN SCIENCE 8

5) What is the acceleration?

8) When an action force occurs, the reaction force is always

9) Newton’s third law of motion describes

12) Work is a method of transferring __________.

13) The following samples are work done on an object EXCEPT:

17) What is vibration?

18) Sound is caused by _________.

21) What happens when white light passes through a prism?

A. The white light will separate into different components of colors

25) What is the unit of voltage?

26) What supplies energy in an electric circuit?

27) Which diagram below illustrates a parallel connection?

28) What device helps prevent electrical fires?

29) What is a fuse?

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