Change of State

An uncovered pot of soup is simmering on Mr. Owens's stove, and there are water droplets on the wall behind it.  What sequence can you infer has occurred?

• vaporization, then condensation
• freezing, then thawing
• condensation, then vaporization
• Mr. Owens is a mess

The change from liquid to solid, or the reverse of melting, is called:

• freezing
• condensation
• boiling
• sublimation

What is vaporization?

• a liquid becoming a gas
• a gas becoming a liquid
• a liquid becoming a solid
• a gas becoming a solid

A shrinking puddle is an example of ___________, or vaporization that takes place only on the surface of a liquid.

• evaporation
• boiling
• freezing
• melting

What happens when the particles in a liquid move so slowly that they begin to take on fixed positions?

• Condensation
• Vaporization
• Melting
• Freezing

The characteristic temperature at which a pure solid changes to a liquid is its __________ point.

• melting
• boiling
• Owens
• pressure

_______ occurs when a liquid changes to a gas below its surface as well as at the surface.

• Boiling
• Evaporation
• Freezing
• Melting

What happens when the particles in a gas lose enough thermal energy to form a liquid?

• condensation
• vaporization
• Mr. Owens farts
• freezing

The phase of matter that has definite shape and definite volume is:

• solid.
• liquid.
• gas.

As the energy of the molecules in a substance increases, the temperature of the substance __________.

• increases
• decreases