Physical and Chemical Changes

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

What is a chemical change?

Back

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

Front

What does the Law of Conservation of Mass state?

Back

Mass is never created or destroyed.

Front

What happens during a chemical change?

Back

New substances are formed.

Front

What happens during a physical change?

Back

The physical properties of a substance change, but its chemical composition remains the same.

Front

Is melting a chocolate bar a physical or chemical change?

Back

Physical Change.

Front

Is burning wood a physical or chemical change?

Back

Chemical Change.

Front

What is an example of a physical change?

Back

Dissolving sugar in water.

Front

What is an example of a chemical change?

Back

Rust forming on iron.

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed.