Section 4 Changes In State

Question 1

True or False, Thermal energy always flows from a warmer substance to a cooler substance.

Answer 1

True

Question 2

What happens when it’s thermal energy increases or decreases by a sufficient amount?

Answer 2

Substance changes state.

Question 3

______________ = Thermal Energy

Answer 3

Temperature

Question 4

The change in state from a solid to a liquid.

Answer 4

Melting

Question 5

The energy in the particles of a substance.

Answer 5

Thermal Energy

Question 6

The change in state from a liquid to a solid.

Answer 6

Freezing

Question 7

A change from liquid water into water vapor.

Answer 7

Vaporization

Question 8

Takes place only on the surface of a liquid.

Answer 8

Evaporation

Question 9

Takes place throughout a liquid.

Answer 9

Boiling

Question 10

Occurs when gas particles lose enough thermal energy to become a liquid.

Answer 10

Condensation

Question 11

Occurs when the surface particles of a solid gain enough energy to become a gas.

Answer 11

Sublimation

Question 12

True or False an addition of energy creates a change in the state.

Answer 12

True

Question 15

True or False, Thermal energy never flows from a warmer substance to a cooler substance.

Answer 15

False

Question 23

True or False, Thermal energy never flows from a cooler substance to a warmer substance

Answer 23

True