Phase Change

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

• freezing
• melting
• boiling
• condensation

The phase change from water vapor to liquid water is known as...

• evaporation
• precipitation
• condensation
• sublimation

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

• sublimation

• condensation

• liquid

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

• sublimation

• condensation

• liquid

Suppose you pour a glass of ice water and set it on the kitchen table. After a few minutes, the outside of the glass will be covered with drops of water. Why did this happen?

• Oxygen in the air cooled and condensed onto the cold glass.

• Water vapor in the air cooled and condensed onto the cold glass.

• Water vapor in the air cooled and evaporated onto the cold glass.

• Water seeped through pores in the glass.

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

The drops of water that appear on the outside of a glass of cold juice on a warm day are an example of?

• sublimation

• condensation

• evaporation

• melting

An ice cube is placed in a pan. The pan is placed over an open flame. Which change will MOST likely happen over time?

• The ice changes to a gas then a liquid.

• The ice changes to a gas and then back to a solid.

• The ice changes to a liquid then to a gas.

• The ice changes to a liquid and back to a solid.

What is an example of sublimation?

• ice cream melting

• dry ice