AnswersGCHS Physical Science B - SC1114Topic Test

Topic Test Answers

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1
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Please select the word from the list that best fits the definition

A
single transformation
B
multiple transformation
2
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Nuclear reactions produce huge amounts of energy by transforming tiny amounts of matter.

A
T
B
F
3

What type of conversion is taking place when natural gas is used to heat water?

A
chemical energy into thermal energy
B
thermal energy into mechanical energy
C
mechanical energy into electromagnetic energy
D
electromagnetic energy into chemical energy
4

The scientist who suggested that energy can be created under certain conditions was

A
Newton.
B
Einstein.
C
Wright.
D
Pascal.
5

To maintain your body temperature, your body converts chemical potential energy into thermal energy.

A
T
B
F
6

Niagara Falls is a good example of

A
kinetic energy being converted into potential energy.
B
potential energy being converted into kinetic energy.
C
energy being lost.
D
energy being created.
7

A light bulb converts electrical energy into both heat and light energy.

A
T
B
F
8

The law of conservation of energy states that when one form of energy is converted into another,

A
energy is destroyed in the process.
B
no energy is destroyed in the process.
C
energy is created in the process.
D
some amount of energy cannot be accounted for.
9

A change from one form of energy into another is called

A
gravitational potential energy.
B
work.
C
conservation of energy.
D
an energy transformation.
10

A roller coaster starts from rest at point A and continues to point B on a frictionless track.What best describes the changes in kinetic and potential energy as the car travels from point A to point B?

Question illustration
A
Kinetic and potential energy both increase.
B
Kinetic energy increases, and potential energy decreases.
C
Kinetic energy decreases, and potential energy remains the same.
D
Kinetic energy remains the same, and potential energy decreases.
11

A pole-vaulter first converts kinetic energy into

A
thermal energy.
B
chemical energy.
C
mechanical energy.
D
elastic potential energy.
12

The energy transformations in a car’s engine are an example of multiple transformations.

A
T
B
F
13

When you rub your hands together on a cold day, you use friction to convert

A
mechanical energy into thermal energy.
B
thermal energy into nuclear energy.
C
nuclear energy into electrical energy.
D
electrical energy into electromagnetic energy.
14

Which best describes the conservation of energy as a pendulum swings in the path shown below?

Question illustration
A
The potential energy at point A is greater than the potential energy at point C.
B
The potential energy at point A is equal to the kinetic energy at point C.
C
The potential energy at point A is greater than the kinetic energy at point B.
D
The potential energy at point A is equal to the kinetic energy at point B.
15

An electric motor converts electrical energy to potential energy.

A
T
B
F
16

In a machine, work output is less than work input because some energy is converted into thermal energy.

A
T
B
F
17

A ball thrown into the air has its greatest kinetic energy as it reaches the highest point in its path.

A
T
B
F
18

A pendulum is released from rest at point A.If the horizontal line represents the reference point, the pendulum has

Question illustration
A
only potential
B
only kinetic
C
both kinetic and potential
D
neither kinetic nor potential
19

______ states that energy cannot be created or destroyed.

A
Newton’s second law
B
Newton’s third law
C
The law of conservation of energy
D
Boyle’s law
20

Why is mass multiplied by the speed of light squared in Einstein's famous equation?

A
Mass is only converted to kinetic energy
B
Mass isn't conserved like energy is
C
Energy is unstable
D
The energy created is moving at the speed of light

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