Phase changes

What is the phase change of a solid to a liquid?

• freezing

• melting

• boiling

• condensation

5. What is it called when a solid turns directly into a gas?

• Sublimation
• Condensation
• Liquid

7. All phase changes (changing states) requires energy to be added or taken away.

• True
• False

Change from gas to liquid...

• condensation
• evaporation
• expansion
• movement

Change from Liquid to Solid is called ...

• fusion

• Freezing

• sublimation

• evaporation

What happens to particles when energy is added (heated)?

• They speed up and spread out

• They slow down and compress

• They stop moving

• They move closer together and speed up

What is sublimation?

• phase change between solid and liquid
• pahse change from gas to solid
• phase change from solid to gas
• phase change from solid to solid

Between which two points is the solid cooling?

• A <---- B

• B <----> C

• C <---- D

• D <----> E

• E <---- F

Between which two points is the gas heating up?

• A ----> B

• B <---- C

• C ----> D

• D ----> E

• E ----> F

Between which points is the temperature of the substance remaining constant?

• A-B only. 
• A-B, C-D, E-F
• B-C only. 
• B-C, D-E