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Energy Transformations — Quiz Answers

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1
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Wood has chemical energy, which can be used to generate thermal and radiant energy when burned in a fireplace. Which best explains what happens to the total amount of energy in this scenario?

A
The total energy in the system increases because chemical energy creates thermal and radiant energy.
B
The total energy in the system remains the same as the increase in chemical energy equals the decrease in thermal and radiant energy.
C
The total energy in the system remains the same as the decrease in chemical energy equals the increase in thermal and radiant energy.
D
The total energy in the system decreases because chemical energy disappears as thermal and radiant energy are generated.
2
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The human body stores chemical energy from digested food. Some of the chemical energy is converted into mechanical energy when the body moves. Which statement is best supported by this information?

A
The body does not convert chemical energy to kinetic energy.
B
Digested food is a source of potential energy.
C
Digested food is a form of radiant energy.
D
The body does not convert chemical energy to thermal energy.
3

Savion listed the steps involved when nuclear power plants generate electricity. Nuclear reaction occurs. Nuclear energy is converted to radiant and thermal energy. Heat is used to generate steam. Light and heat are released. Steam turns turbines. Mechanical energy is converted to electrical energy. Which best explains how to correct Savion’s error?

A
In step 2, change “radiant and thermal ” to “chemical and mechanical.”
B
Reorder the steps so that step 6 appears before step 5.
C
In step 6, change “mechanical” to “thermal.”
D
Reorder the steps so that step 4 appears before step 3.
4

What happens in terms of energy when a moving car hits a parked car, causing the parked car to move?

A
Kinetic energy in the parked car is created.
B
The parked car transfers kinetic energy to the moving car.
C
The moving car transfers kinetic energy to the parked car.
D
Kinetic energy in the moving car disappears.
6

Which change is an example of transforming potential energy to kinetic energy?

A
changing nuclear energy to radiant energy
B
changing mechanical energy to chemical energy
C
changing radiant energy to electrical energy
D
changing thermal energy to electrical energy
8

Taro stated that when someone hits a golf ball with a club, the amount of energy the ball has changes, the amount of energy that the club has changes, and the total energy of the system that includes the ball and the club increases. Which best explains Taro’s error?

A
The total energy of the system decreases.
B
The amount of energy that the ball has does not change.
C
The total energy of the system remains the same.
D
The amount of energy that the club has does not change.
9

Which energy transformation does the picture best illustrate?

A
chemical to thermal
B
radiant to chemical
C
nuclear to mechanical
D
mechanical to chemical
10

Which energy transformation is represented in the diagram?

A
chemical to electrical and nuclear
B
nuclear to thermal and radiant
C
nuclear to electrical and chemical
D
chemical to nuclear and radiant

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Energy Transformations — Quiz Answers — Physical…