Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of one or more new substances with different properties.

Front

Give an example of a physical change.

Back

A chainsaw cutting down a tree.

Front

What happens to the mass of a substance during a physical change?

Back

The mass remains the same.

Front

What happens to the mass of a substance during a chemical change?

Back

The mass is conserved, but the substances change.

Front

What is an example of a chemical change?

Back

A copper penny turning green after a few years.

Front

What is a mixture?

Back

A combination of two or more substances where each retains its own properties.

Front

Why is a mixture considered a physical change?

Back

Because the parts can be separated without a chemical reaction.

Front

What is an example of a physical change involving temperature?

Back

Melting ice.

Front

What is an example of a chemical change involving heat?

Back

Burning wood in a campfire.