Chapter Two, Lesson Two: Changes of State

Question 1

melting

Answer 1

The change in state from a solid to a liquid is called melting.

Question 2

melting point

Answer 2

In pure, crystalline solids, melting occurs at a specific temperature, called the melting point.

Question 3

freezing

Answer 3

The change in state from a liquid to a solid is called freezing.

Question 4

vaporization

Answer 4

The change in state from a liquid to a gas is called vaporization.

Question 5

evaporation

Answer 5

Vaporization that takes place only on the surface of a liquid is called evaporation.

Question 6

boiling

Answer 6

Vaporization that takes place both below and at the surface of a liquid is called boiling.

Question 7

boiling point

Answer 7

The temperature at which a liquid boils is called its boiling point.

Question 8

condensation

Answer 8

The change in state from a gas to a liquid is called condensation.

Question 9

sublimation

Answer 9

Sublimation occurs when the surface particles of a solid gain enough energy that they form a gas.