Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

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

Back

The molecules in a solid gain energy and move apart, allowing the solid to become a liquid.

Front

What is an example of a gas turning into a liquid?

Back

An example of a gas turning into a liquid is water vapor condensing into water droplets.

Front

What is evaporation?

Back

Evaporation is the process by which a liquid turns into a gas.

Front

What is condensation?

Back

Condensation is the process by which a gas turns into a liquid.

Front

What is an example of a solid?

Back

An example of a solid is ice.

Front

What is an example of a liquid?

Back

An example of a liquid is water.

Front

What is an example of a gas?

Back

An example of a gas is oxygen.

Front

What happens to the temperature during melting?

Back

The temperature remains constant during melting until the entire solid has turned into a liquid.