Question 1 (Multiple Choice Worth 2 points)

When a liquid becomes a solid, this is called

freezing point
thermal point
boiling point
flash point

Question 2 (Multiple Choice Worth 2 points)

Which of the following statements about boiling points is true?

The boiling point is the same for all substances
The boiling point of a substance can be the same as the freezing
The boiling point of a substance is lower than its freezing point
The boiling point of a substance is higher than its freezing point

Question 3 (Multiple Choice Worth 2 points)

“Phase change” and “change of state”

are opposites
sometimes mean the same thing
are unrelated
are two terms for the same thing

Question 4 (Multiple Choice Worth 2 points)

Heat being added or taken away from a substance may cause

a change in chemical properties
a change in state
change in the boiling point
change in the freezing point

Question 5 (Multiple Choice Worth 2 points)

The change from a solid to a liquid state is called

melting.
evaporation.
condensation.
sublimation.

Question 6 (Multiple Choice Worth 2 points)

The boiling point is the temperature at which

a solid becomes a liquid
a liquid becomes a gas
a gas becomes a solid
a solid becomes a gas

Question 7 (Essay Worth 3 points)

Explain how changes in temperature affect the particle motion of a substance.