Phase Change

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

• freezing
• melting
• boiling
• condensation

2. A change of state from a liquid to a solid is called....

• Melting
• Freezing
• Evaporation

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

• Sublimation
• Condensation
• Liquid

In a solid, the particles

• vibrate in place
• slide past one another
• overcome the strong attraction

Molecules are closest together in a 

• Solid
• Liquid
• Gas

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

• True
• False

You have decided to start sealing all your letters with glittery wax because you are so "cool". Which answer BEST explains what you must do to make the SOLID wax a LIQUID?

• In order to make the SOLID wax a LIQUID you must ADD HEAT ENERGY by putting the wax in the FREEZER.

• In order to make the SOLID wax a LIQUID you must ADD HEAT ENERGY by putting the wax over a FLAME.

• In order to make the SOLID wax a LIQUID you must REMOVE HEAT ENERGY by putting the wax in an OVEN.

You have dropped your popsicle and are watching it become a LIQUID. Which answer BEST explains what PHASE CHANGE has occurred AND how the molecule MOVEMENT has changed?

• The PHASE CHANGE that has occurred is CONDENSATION and the molecule MOVEMENT has become FASTER.

• The PHASE CHANGE that has occurred is EVAPORATION and the molecule MOVEMENT has become SLOWER.

• The PHASE CHANGE that has occurred is MELTNG and the molecule MOVEMENT has become FASTER.

What is an example of evaporation?

• Water boiling
• Water turning into ice
• Chocolate bar turning into liquid chocolate
• Fog forming on a mirror

What is an example of condensation?

• Water boiling
• Water turning into ice
• Chocolate bar turning into liquid chocolate
• Fog forming on a mirror