Phase Changes

What is an example of a physical change mentioned in the text?

• Burning wood

• Rusting iron

• Melting ice

• Baking a cake

What is the state of matter of water at 0°C when it is not frozen?

• Solid

• Liquid

• Gas

• Plasma

What happens to particles when they gain or lose thermal energy?

• They change color.

• They undergo a state change.

• They become larger.

• They emit light.

What is the heat of vaporization?

• The energy needed to turn a solid into a liquid.

• The energy needed to turn a liquid into a gas.

• The energy needed to turn a gas into a solid.

• The energy needed to turn a liquid into a solid.

What state change occurs at the boiling point?

• Solid to liquid

• Liquid to gas

• Gas to solid

• Liquid to solid

What is the term for a gas turning into a liquid?

• Melting

• Freezing

• Condensation

• Sublimation

What is the opposite process of melting?

• Boiling

• Freezing

• Evaporating

• Condensing

What is the main form of energy involved in melting and freezing?

• Light

• Sound

• Heat

• Electricity

What is the phase change from solid to liquid called?

• Condensation

• Melting

• Freezing

• Sublimation

What is vaporization?

• The phase change from gas to liquid by adding energy

• The phase change from liquid to gas by adding energy

• The phase change from solid to liquid by removing energy

• The phase change from gas to solid by removing energy