Introduction to Energy Answers

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Abin is doing work by lifting a bowling ball. Which statement could be made about the energy in this situation?

A
Energy is being transferred from the ball to his arm muscles.
B
Energy is being transferred from his arm muscles to the ball.
C
Energy would be recorded in units of hertz and power.
D
Energy would change from potential to chemical.
3

Gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. Which statement best describes Gabriel’s measurements?

A
They will remain constant.
B
They will both be recorded in joules.
C
They will both be recorded in hertz.
D
They will involve compressions.
4

Which statement best describes the work and energy in these examples?Example 1: Running a car requires gas.Example 2: Humans require food to live.

A
The gas and food are examples of energy.
B
The gas and food are examples of work.
C
The gas and humans are examples of work.
D
The food and car are examples of energy.
5

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is one form of energy that she is studying?

A
gravitational potential energy
B
electrical energy
C
chemical energy
D
elastic potential energy
6

How does work affect energy between objects so it can cause a change in the form of energy?

A
Work transfers energy.
B
Work changes energy.
C
Work increases energy.
D
Work decreases energy.
9

When Anna eats an apple, the sugars in that apple are broken down into the substance called glucose. Glucose is then burned in her body for energy. One of the body parts that needs this energy is the heart, which beats due to electrical impulses. A byproduct of this glucose breakdown is the heat that warms her body and is later released.

A
Mechanical energy is converted to kinetic energy, which is then converted to potential energy.
B
Chemical energy is converted to thermal energy and electrical energy.
C
Electrical energy is converted to chemical energy and thermal energy.
D
Mechanical energy is converted to potential energy which is then converted to kinetic energy.
10

What is the energy of an object because of its potential and kinetic energies?

A
chemical energy
B
electrical energy
C
nuclear energy
D
mechanical energy

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