At higher temperatures

• particles in an object have less energy

• particles in an object move faster

• a gas contracts

A gas

• has a definite shape but no definite volume

• has a definite volume but no definite shape

• has fast-moving particles

Freezing

• Solid to gas

• Liquid to solid

• Gas to solid

• Liquid to gas

Boiling

• liquid to gas

• gas to solid

• gas to liquid

• solid to liquid

Which state of matter has tightly packed molecules?

• solid

• liquid

• gas

Which state of matter has a definite shape?

• solid

• liquid

• gas

What is happening when my ice cream changes from a solid to a liquid?

• freezing

• melting

• burning

• evaporation

Define a liquid.

• Indefinite shape, indefinite volume

• Definite shape, definite volume

• Found in stars

• Definite volume, indefinite shape

The state of matter that has no definite size or shape is

• Solid

• Liquid

• Gas

Particles (molecules) in a ______________________ have more energy than the other states of matter.

• gas

• solid

• liquid