Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change alters the physical properties of a substance but does not create a new substance.

Front

What is a chemical change?

Back

A chemical change results in the formation of one or more new substances and cannot be easily reversed.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a 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

Is dissolving sugar in water a physical or chemical change?

Back

Dissolving sugar in water is a physical change.

Front

Is rusting of iron a physical or chemical change?

Back

Rusting of iron is a chemical change.

Front

What is an indicator of a chemical change?

Back

Color change, gas production, or temperature change can indicate a chemical change.

Front

What is an indicator of a physical change?

Back

Change in state (solid, liquid, gas) is an indicator of a physical change.