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.