Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and cutting.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and digestion.

Front

Is burning wood a chemical or physical change?

Back

Chemical change.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical composition remains the same.

Front

What happens during a chemical change?

Back

During a chemical change, the substances involved undergo a transformation that changes their chemical structure, resulting in new substances.

Front

Is cutting your hair a physical or chemical change?

Back

Physical change.

Front

What is an example of a physical change?

Back

Inflating a tire is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What changes did water undergo when it evaporates and then condenses?

Back

The water undergoes evaporation (turning from liquid to gas) and then condensation (turning from gas back to liquid).

Front

Is mowing the lawn a physical or chemical change?

Back

Physical change.