Question

Chapter 15 Energy
Section 15.1 Energy and Its Forms
(pages 446–452)
This section describes how energy and work are related. It defines kinetic energy
and potential energy, and gives examples for calculating these forms of energy. It
also discusses examples of various types of energy.
Reading Strategy (page 446)
Building Vocabulary As you read, complete the concept map with
vocabulary terms and definitions from this section. For more information on
this Reading Strategy, see the Reading and Study Skills in the Skills and
Reference Handbook at the end of your textbook.
Energy and Work (page 447)
1. What is energy?
2. When work is done on an object, is transferred to
that object. Circle the correct answer.
energy heat height
3. Circle the letter of each sentence that is true about work and energy.
a. Energy in food is converted into muscle movement.
b. Both work and energy are usually measured in joules.
c. One joule equals one meter per newton.
Kinetic Energy (pages 447–448)
4. The energy of motion is called .
5. Is the following sentence true or false? You can determine the kinetic
energy of an object if you know its mass and its volume.
Physical Science Reading and Study Workbook Level B ■ Chapter 15 173
© by Savvas Learning Company LLC. publishing as Savvas Prentice Hall. All rights reserved.
which
can
be
elastic potential
energy
which
is
potential energy
Energy can
be

Energy is the ability to do work or cause change.
kinetic energy
False


6. Circle the letter of the formula used to calculate an object’s kinetic
energy.
a. Kinetic energy = mv2
b. Kinetic energy = mv2
c. Kinetic energy =
Potential Energy (pages 448–450)
7. What is potential energy?
8. Is the following sentence true or false? The work done by a rock climber
going up a cliff decreases her potential energy.
9. An object’s gravitational potential energy depends on its
, its , and the acceleration due to
gravity. Circle the correct answers.
height mass size
10. Is the following sentence true or false? Gravitational potential energy of
an object increases as its height increases.
11. The potential energy of an object that is stretched or compressed is
known as .
Forms of Energy (pages 450–452)
For numbers 12 through 17, write the letter of the form of energy that best matches
the description.
Descriptions Forms of Energy
12. Energy stored in gasoline,
coal, and wood
13. The sum of an object’s potential
energy and kinetic energy,
excluding atomic-scale movements
14. Produces the sun’s heat and light
15. Travels through space in the form
of waves
16. Produces lightning bolts
17. Increases as atoms within an object
move faster

Answer 1

Here are the answers:

Energy and Work
1. Energy is the ability to do work or cause change.
2. energy
3. True: a and b. False: c. (1 joule = 1 newton·meter, not 1 meter per newton.)

Kinetic Energy
4. kinetic energy
5. False (you need mass and speed/velocity, not volume)
6. Kinetic energy = 1/2 mv^2

Potential Energy
7. Potential energy is stored energy due to an object’s position, condition, or composition.
8. False (going up increases her gravitational potential energy)
9. mass and height
10. True
11. elastic potential energy

Forms of Energy
12. chemical energy
13. mechanical energy
14. nuclear energy
15. radiant (electromagnetic) energy
16. electrical energy
17. thermal energy