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 changes the physical properties of an object, but does not create a new substance.

Front

Is burning wood a physical or chemical change?

Back

Chemical change.

Front

Is freezing juice a physical or chemical change?

Back

Physical change.

Front

What happens to substances during a chemical change?

Back

They undergo a transformation that results in the formation of new substances.

Front

Can a physical change be reversed?

Back

Yes, physical changes can often be reversed.

Front

Can a chemical change be reversed?

Back

No, chemical changes usually cannot be reversed.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Rust forming on iron.

Front

What are some indicators of a chemical change?

Back

Color change, temperature change, gas production, and formation of a precipitate.