PS07-4 STATES OF MATTER

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