Name: Date:

Co

pyr

igh

t © 2

014

by

Seve

nth

-da

y A

dve

ntis

ts/N

ort

h A

me

rica

n D

ivis

ion

Offi

ce

of E

du

ca

tion

Level 7

What Is Thermal Energy?For items 1–8, fill in the blank(s) to complete each statement correctly.

1. Thermal energy that is transferred between substances at different temperatures is called

.

2. The total energy associated with the random movement of all of the particles of a

substance or a system is called energy.

3. The ability to conduct heat is called .

4. The theory of states that matter is composed of large numbers of very small particles that are constantly moving about randomly.

5. The temperature at which particles have almost zero motion is called .

6. The heat required to change the temperature of one kilogram of a substance by one

degree Celsius is called .

7. The measure of how hot or cold a substance or system is is called .

8. Once the same amount of heat is transferred in both directions between two systems of

different temperatures in contact with each other, has been achieved.

Answer the following questions on the lines provided.

9. If a system that contains 1500 J of thermal energy is reduced by one third, how much thermal energy is left?

10. The temperature of 75°C is equal to what temperature in kelvin?

11. What direction does heat always transfer in?

12. What is a better thermal conductor: a rug or a stone floor? Why?

13. What three processes does water go through as it changes from ice to water, to water vapor, and then back to ice?

14. What three processes does water go through as it goes from water vapor to water, to ice, and then back to water vapor?

Essential Question

Chapter 14 • Lesson 3 Use with pp. 535–546 Lesson Support

KH_BD1_SJG7_U4C14L3_LS.indd 2 8/15/14 11:15 AM