_____________________________________________________________________________
1ST PERIODIC TEST IN SCIENCE 8
Name: ___________________________
Score: ____________
Grade & Section: __________________
Date: _____________
MULTIPLE CHOICE
Directions: Read each question carefully. Choose the letter that corresponds to the correct answer
and write on the space provided before each number.
___1. What equation represents the Law of Acceleration?
A. a = Fnet/m
B. a = m/Fnet
C. a = (Fnet) (m)
D. a = Fnet + m
___2. What is the standard unit of force?
A. kilogram
B. meter
D. second
C. newton
___3. What other quantity is acceleration dependent upon aside from the net force?
A. distance
B. height
C. mass
D. time
___4. What Law of Motion is concerned with the relation of acceleration to mass and force?
A. Acceleration B. Gravity
C. Inertia
D. Interaction
___5. How does the acceleration of an object related to the force applied to it?
A. directly proportional
B. inversely proportional
C. not related
D. remains the same
___6. How much force is applied to an object with a mass of 5 kg and accelerates at 3 m/s 2?
A. 12 kg m/s2 B. 13 kg m/s2
C. 14 kg m/s2
D. 15 kg m/s2
___7. When a cannon fires a cannonball, we observe Newton’s third law. Which force is the
reaction force?
A. the cannon moving forward
B. the cannon moving backward
C. the cannonball moving forward
D. the cannonball moving backward
___8. Actionreaction forces do NOT cancel each other out because the forces act on what
objects?
A. smaller
B. the same
C. different
D. bigger objects
___9. A bus hits a bug and the bug splatters on the windshield. Which object exerts greater force?
A. the bug
C. both the bug and the bus
B. the bus
D. neither the bug nor the bus
___10. What reaction force will take place if earth’s gravity pulls a skydiver towards it?
A. weight of the skydiver
B. dragging force of the diver
C. resistance between the air and sky diver
D. gravity of the skydiver pulling the earth towards him/her
___11. What would be the result if you hit the wall with a stick?
A. You push against the stick.
B. The stick pushes against you.
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C. The wall pushes against you.
D. The wall pushes against the stick.
___12. A person steps out of the boat and onto the dock. As he moves forward onto the dock, the
boat moves backward. How will you explain the scenario?
A. An object at rest tends to stay at rest.
B. Friction opposes the motion of an object.
C. For every action, there is an equal and opposite reaction.
D. A more massive object is more difficult to move from rest.
___13. Which of the following quantities has the greatest influence on the amount of kinetic energy
of a car while traveling on a highway?
A. mass
B. size
C. speed
D. weight
___14. Which of the following pair of quantities are the factors that affect kinetic energy?
A. force and distance
C. mass and speed
B. mass and height
D. time and height
___15. Which of the following does NOT affect the amount of potential energy of an object?
A. mass
C. speed
B. height or location
D. strength of gravity
___16. Which of the following statement is TRUE about potential energy?
A. It depends on mass and elevation.
B. It is dependent on the speed of an object.
C. It does not depend on the strength of gravity.
D. It does not depend on the mass of an object.
___17. When a basketball and a ping pong ball are thrown and travel at the same velocity, the
kinetic energy of the basketball is ________ the kinetic energy of the ping pong ball.
A. equal to
B. greater than
C. lesser than
D. not related to
___18. What happens to the kinetic energy of an object if its speed is doubled?
A. twice as much
B. thrice as much
C. increases four times
D. decreases four times
___19. In which medium do sound waves travel the fastest?
A. gas
B. liquid
C. plasma
D. solid
___20. In which medium do sound waves travel the slowest?
A. gas
B. liquid
C. plasma
D. solid
___21. What do you call the vibration that propagates as an acoustic wave?
A. electromagnet
B. gravity
C. light
D. sound
___22. What will happen to the speed of sound if the temperature is increased?
A. The speed of sound will increase.
B. The speed of sound will decrease.
C. The speed of sound is not affected.
D. The speed of sound will increase, then decrease.
___23. Which of the following temperature of air does sound travels the fastest?
A. 0 oC
B. 25 oC
C. 50 oC
D. 75 oC
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___24. What is the speed of sound in the air with a temperature of 40°C?
A. 354 m/s
B. 355 m/s
C. 356 m/s
D. 357 m/s
___25. What instrument is used to measure temperature?
A. barometer B. calorimeter
C. oximeter
D. thermometer
___26. The average kinetic energy of the particles of a body is a measure of the body's ______.
A. heat
B. mass
C. temperature
D. volume
___27. Which of the following terms describes a transfer of energy?
A. heat
B. kinetic energy C. internal energy D. temperature
___28. It refers to the amount of heat required to increase the temperature of one unit mass of a
given material by 1 degree Celsius.
A. calories
B. degrees Celsius
C. specific heat capacity
D. temperature
___29. What quantity of heat (Q) must be added to 50 grams of water at 10 °C to increase its
temperature to 50 °C? (Use the formula Q = mc∆t)
A. 1000 cal B. 2000 cal
C. 3000 cal
D. 4000 cal
___30. Your hand felt cold when you touched the cold water in a bucket because the _______.
A. water is hotter than your hand.
B. heat from your hand flowed to the water.
C. heat from the water flowed to your hand.
D. water and your hand have the same temperature.
___31. What do you call the pressure that forces electrons to flow through a circuit?
A. current
B. power
C. resistance
D. voltage
___32. Which of the following is the unit used in electric current?
A. amperes B. ohms
C. volts
D. watts
___33. Among Ohm’s law’s mathematical equations, which of the following is used in solving
resistance?
A. I = V/R
B. R = V/I
C. R = I/V
D. R = IV
___34. If the voltage stays the same and resistance is increased, what will happen to the current?
A. decreases B. increases
C. stays neutral
D. stays the same
___35. How many volts are needed to produce a current flow of 8 amperes through a 6-ohm
resistor?
A. 0.75 V
B. 1.33 V
C. 14 V
D. 48 V
___36. This circuit below has a 24-volt battery, and the resistor is 8 ohms. How many amperes are
running through the circuit?
A. 3 A
B. 16 A
C. 32 A
___37. What electrical circuit has only one path for current flow?
A. close
B. open
C. parallel
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D. 192 A
D. series
___38. What is the unit for measuring resistance?
A. ampere
B. newton
C. ohms
D. volt
___39. A series circuit has ____________ path(s) that the electric current can flow.
A. one
B. two
C. three
D. four
___40. Parallel circuits have:
A. no electricity to flow through it. C. more than one path of current to flow.
B. only one path of current to flow. D. magnets that cause an electric current.
___41. Three 5-V bulbs are connected in parallel. What happens to the other two bulbs if one of
them gets busted? The other two bulbs will ____________.
A. also be busted
B. have no electricity
C. not light up
D. still light up
___42. Twenty (20) series lights are plugged into an outlet. The current input is 60 amperes. What
is the current of each bulb?
A. 30 A
B. 60 A
C. 90 A
D. 120 A
___43. What device is used to protect electric circuits and electric appliances against high currents
caused by short-circuiting or overloading?
A. dry cell
B. fuse
C. resistor
D. switch
___44. In Ohm’s Law, what is the relationship between resistance and current?
A. equal
C. directly proportional
B. direct - inverse
D. inversely proportional
___45. What device converts electrical energy into another useful form?
A. fuse
B. load
C. resistor
D. switch
___46. A closed loop of a conductor that electrons can travel around is called ________.
A. electric appliance
C. electric circuit
B. electric current
D. electric field
___47. Fuse melts when the current in the circuit is ____________.
A. greater than the rated current of the fuse
B. lesser than the rated current of the fuse
C. lower than the melting point of the fuse
D. the same with the rated current of the fuse
___48. How do circuit breakers work? By having:
A. pieces of metal wire that melt when the current gets too low.
B. pieces of metal wire that melt when the current gets too high.
C. an electromagnet that will break a circuit if the current gets too low.
D. an electromagnet that will break a circuit if the current gets too high.
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ANSWER KEY (GRADE 8)
1. A
21. D
41. D
2. C
22. A
42. B
3. C
23. D
43. B
4. A
24. B
44. C
5. A
25. D
45. B
6. D
26. C
46. C
7. B
27. A
47. A
8. C
28. C
48. D
9. B
29. B
10. D
30. B
11. D
31. D
12. C
32. A
13. A
33. B
14. B
34. A
15. C
35. A
16. A
36. A
17. B
37. A
18. A
38. C
19. D
39. A
20. A
40. B
12/9-10/2022
5
LEARNING COMPETENCIES
%
Sessions
(Hours)
No. of
Questions
Remembering Underst
Investigate the relationship between the amount of force applied and the
mass of the object to the amount of change in the object’s motion
4
13
6
4
1
Infer that when a body exerts a force on another, an equal amount of
force is exerted back on it
4
13
6
3
1
Identify and explain the factors that affect potential and kinetic energy
4
13
6
4
1
Investigates the effect of temperature to the speed of sound
4
13
6
3
1
Differentiate between heat and temperature at the molecular level
4
13
6
4
1
Infer the relationship between current and voltage
4
13
6
3
1
Explain the advantages and disadvantages of series and parallel
connections in homes
4
13
6
4
1
Explain the functions of circuit breakers, fuses, earthing, double
insulation, and other safety devices in the home
4
13
6
4
1
32
104
48
29
8
TOTAL
6