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.