Phase Changes

Front

What is a solid?

Back

A solid is a state of matter that has a definite shape and a definite volume.

Front

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

Back

The phase change of a solid to a liquid is called melting.

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor (gas) when it is heated.

Front

What is freezing?

Back

Freezing is the phase change from a liquid to a solid.

Front

What is condensation?

Back

Condensation is the process by which water vapor (gas) cools and turns back into liquid water.

Front

What is boiling?

Back

Boiling is the rapid vaporization of a liquid that occurs when it is heated to its boiling point.

Front

What is the difference between evaporation and boiling?

Back

Evaporation occurs at any temperature and only at the surface of the liquid, while boiling occurs at a specific temperature throughout the liquid.

Front

What happens to the molecules in a solid when it melts?

Back

When a solid melts, its molecules gain energy, move apart, and transition into a liquid state.

Front

What is the boiling point of water?

Back

The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure.

Front

What is sublimation?

Back

Sublimation is the phase change from a solid directly to a gas without passing through the liquid state.