Physical and Chemical Changes

Front

What is a physical change?

Back

A change in size, shape, or state of matter that does not create something new.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

True or False: Freezing is a physical change.

Back

True

Front

What happens to thermal energy when a liquid freezes?

Back

Thermal energy is removed.

Front

Why is melting ice considered a physical change?

Back

Nothing new was created; there was only a change in the state of matter.

Front

What is an example of a liquid turning into a gas?

Back

Water boiling to become steam.

Front

What is an example of a solid turning into a liquid?

Back

Ice melting to become water.

Front

True or False: The state of matter can change when heat is added or removed.

Back

True

Front

What is an example of a chemical change?

Back

Burning wood, which creates ash and smoke.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not create new substances, while a chemical change does.