Video #2 "Phase Changes of Matter"

Which statement accurately describes the properties of a gas?

• Holds its shape and has a fixed volume.

• Takes the shape of its container and has a fixed volume.

• Takes the shape of its container and has the volume of its container.

• Has an indefinite shape but a fixed volume.

Which of the following phase changes requires heat to be added?

• Freezing

• Condensation

• Melting

• Deposition

What happens when a liquid changes to a solid?

• Evaporation occurs, and heat is added.

• Freezing occurs, and heat is removed.

• Sublimation occurs, and heat is added.

• Condensation occurs, and heat is removed.

What is the process called when water vapor in the air turns directly into ice on a cold surface, like a car windshield?

• Melting

• Evaporation

• Condensation

• Deposition