Physical and Chemical Changes

Front

What is a chemical change?

Back

A chemical change creates a new substance and cannot be undone.

Front

What is a physical change?

Back

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

Front

Example of a chemical change?

Back

Burning wood is a chemical change because it creates ash and smoke.

Front

Example of a physical change?

Back

Melting ice is a physical change because it changes from solid to liquid but remains water.

Front

Can a chemical change be reversed?

Back

No, a chemical change cannot be reversed.

Front

Can a physical change be reversed?

Back

Yes, a physical change can often be reversed.

Front

What happens to atoms during a chemical change?

Back

Atoms are rearranged to form new substances.

Front

What happens to atoms during a physical change?

Back

Atoms remain the same; only their arrangement changes.

Front

Is rusting of iron a physical or chemical change?

Back

Rusting of iron is a chemical change.

Front

Is freezing water a physical or chemical change?

Back

Freezing water is a physical change.