States of Matter Checkpoint

MATTER COMES IN THREE DIFFERENT STATES

• Solid, liquid, book

• Solid, liquid, gas

• Solid, liquid, Water

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

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

Define a liquid.

• Indefinite shape, indefinite volume
• Definite shape, definite volume
• Found in stars
• Definite volume, indefinite shape

Particles of a liquid

• are tightly packed together and stay in a fixed position.
• have no viscosity.
• decrease in volume with increasing temperature.
• are free to move around one another but still touch.

Thermal energy is...

• heat energy.
• the energy of motion
• energy of nuclear processes.
• an indication of physical change.

A chemical change

• doesn't really change much.
• creates a new substance
• is a change in the state of matter

A physical change is...

• a change that doesn't change the identity
• a change that makes something new.
• a chemical reaction