Physical and Chemical Changes

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

What is a chemical change?

Back

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

Front

Example of a physical change?

Back

Melting ice is a physical change because it changes state but remains water.

Front

Example of a chemical change?

Back

Burning wood is a chemical change because it produces ashes and smoke.

Front

What happens to the substance in a physical change?

Back

The substance remains the same, only its form or appearance changes.

Front

What happens to the substance in a chemical change?

Back

The original substance is transformed into one or more new substances.

Front

Is dissolving sugar in water a physical or chemical change?

Back

It is a physical change because the sugar can be recovered.

Front

Is rusting of iron a physical or chemical change?

Back

It is a chemical change because it creates rust, a new substance.

Front

What is an example of a reversible physical change?

Back

Freezing and melting water are reversible physical changes.

Front

What is an example of an irreversible chemical change?

Back

Cooking an egg is an irreversible chemical change.