Change of phase

A state of matter with a definite volume, but no definite shape is a(n) __________________.

• Gas

• Liquid

• Solid

A state of matter with a definite volume and shape is a(n) __________________.

• Gas

• Liquid

• Solid

Describe the particles in a solid. 

• Far apart and move in all directions at great speed

• Loose particles that move freely around one another

• Particles packed together. Vibrate in place.

Describe the particles in a gas. 

• Far apart and move in all directions at great speed

• Loose particles that move freely around one another

• Particles packed together. Vibrate in place.

Is energy added or removed when a gas changes into a solid?

• Energy is added

• Energy is removed

• Energy is neither added or removed

Is energy added or removed when a liquid changes into a gas?

• Energy is added

• Energy is removed

• Energy is neither added or removed

Molecules will move faster and farther apart when state changes from ________. 

• liquid to solid

• gas to liquid

• gas to solid

• liquid to gas

_________ is the change from a liquid to a gas state. 

• Freezing

• Melting

• Condensation

• Evaporation

Heating a substance causes kinetic energy to increase. 

• True

• False

Particles move faster when the temperature is decreased. 

• True

• False