Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same.

Front

What is a chemical change?

Back

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

Front

What happens to thermal energy during freezing?

Back

Thermal energy is removed from the liquid, causing it to change into a solid.

Front

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

Back

Boiling water is an example of a liquid turning into a gas.

Front

What state of matter has a definite shape and volume?

Back

Solid.

Front

What state of matter takes the shape of its container but has a definite volume?

Back

Liquid.

Front

What state of matter has no definite shape or volume?

Back

Gas.

Front

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

Back

True.

Front

What is another name for a chemical change?

Back

Chemical reaction.

Front

What is melting?

Back

Melting is the process of a solid turning into a liquid when heat is added.