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Physical Science
Chapter 4
Worksheet 1
Name ________________________
Period________________________
Match the definition to the correct word or phrase
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1. Power
A. Machine that does work with only one movement
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2. Compound machine
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3. System
B. Energy that is stored due to the interactions between
objects
C. States that energy cannot be created or destroyed
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4. Efficiency
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5. Elastic potential energy
D. A region or set of regions around which a boundary
can be defined
E. The ability to cause change
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6. Mechanical energy
F. A device that makes doing work easier
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7. Machine
G. Ratio of the output force exerted by a machine to the
input force applied to the machine
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8. Potential energy
H. Machine that is a combination or two or more simple
machines
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9. Work
I.
Energy that is due to the gravitational force between
objects
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10. Chemical potential energy
J.
Sum of the potential energy and kinetic energy of the
objects in a system
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11. Mechanical advantage
K. Energy that is due to chemical bonds
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12. Law of conservation of energy
L. Rate at which energy is converted
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13. Kinetic energy
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14. Gravitational potential energy
M. Energy that is stored by compressing or stretching an
object
N. Energy a moving object has because of its motion
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15. Simple machine
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16. Energy
O. Transfer of energy when a force is applied over a
distance
P. Ratio of the output work done by the machine to the
input work done on the machine
Circle the letter that corresponds to the correct answer
17. Using the scientific definition, which statement is always true of work?
a. It is difficult
b. It involves levers
c. It involves a transfer of energy
d. It is done with a machine
18. The gravitational potential energy of a cucumber-Earth system changes when which factor
changes?
a. The cucumber’s speed
b. The cucumber’s mass
c. The cucumber’s temperature
d. The cucumber’s length
19. Which cannot be done by a machine?
a. Increase force
b. Increase work
c. Change direction of a force
d. Increase velocity
20. Which factor increases as the efficiency of a machine increases?
a. Work input
b. Work output
c. Friction
d. Input force
21. Friction causes mechanical energy to be converted into which form?
a. Thermal energy
b. Nuclear energy
c. Kinetic energy
d. Potential energy
22. What term indicates the number of times a machine multiplies the input force?
a. Efficiency
b. Power
c. Mechanical advantage
d. Resistance
23. What energy transformations occur when a lump of clay is dropped?
a. GPE→KE→thermal energy
b. KE→chem PE→thermal energy
c. KE→GPE→thermal energy
d. GPE→KE→elastic PE
24 Suppose a juggler is juggling oranges. At an orange's highest point, what form of energy does
it have?
a. mostly potential energy
b. mostly kinetic energy
c. no potential or kinetic energy
d. equal amounts of both
25. The gravitational potential energy of an object depends on which of the following?
a. velocity and height
b. velocity and weight
c. weight and height
d. weight and acceleration
26. Which idea is central to the law of conservation of energy?
a. Friction produces thermal energy
b. People must conserve energy
c. The total amount of energy is constant
d. Energy is the ability to cause change
27. To what property of an object is kinetic energy directly related?
a. volume
b. height
c. position
d. mass
The six simple machines are: the lever, wheel and axle, the pulley, the ramp, the wedge,
and the screw. Classify each of the machines in the list below.
28.
29.
30.
31.
32.
33.
34.
35.
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Knife
Wheel barrow
Ramp
Screwdriver
Block and tackle
Door knob
Saw
Steering wheel
Circle T if the statement is true or F if the statement is false
T
T
T
F
F
F
36. Energy is the ability to cause change and can take different forms
37. Kinetic energy is the energy stored in an object due to its position
38. The Law of conservation of Energy states that the total amount of energy in the
universe always stays the same
T
T
F
F
39. Because of friction energy is not conserved.
40. The faster an object moves the greater its kinetic energy
T
F
T
T
F
F
41. A snowboarder at the top of Terry Peak has more potential energy than a
snowboarder at the top of Lookout Mountain.
42. Mechanical energy is equal to the total kinetic energy in a system.
43. Energy stored in chemical bonds is called gravitational potential energy.