Changes in Matter

Front

What is a physical change?

Back

A physical change is a change in which no new substances are formed. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

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

Front

Is salt dissolving in water a physical or chemical change?

Back

Physical change.

Front

Is fireworks exploding in the sky a physical or chemical change?

Back

Chemical change.

Front

Is water freezing into ice a physical or chemical change?

Back

Physical change.

Front

Is breaking a plate a physical or chemical change?

Back

Physical change.

Front

Is a nail rusting a physical or chemical change?

Back

Chemical change.

Front

What happens to the molecules during a physical change?

Back

The molecules rearrange but do not change their chemical structure.

Front

What happens to the molecules during a chemical change?

Back

The molecules break apart and form new molecules with different chemical structures.

Front

Give an example of a physical change.

Back

Melting ice.