Self Check: Physical & Chemical Changes

Front

What is a chemical change?

Back

A chemical change occurs when one or more substances change into entirely new substances.

Front

What is a physical change?

Back

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

Front

Give an example of a physical change.

Back

A glass falling and shattering on the floor.

Front

What happens to substances during a chemical change?

Back

They undergo a transformation to form new substances with different properties.

Front

Is sour milk an example of a physical change?

Back

No, sour milk is a result of a chemical change.

Front

What is an example of a chemical change?

Back

Baking soda and vinegar chemically combine to make a new substance.

Front

Are all molecules compounds?

Back

No, not all molecules are compounds; some are elements.

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

Front

What is crumpling paper an example of?

Back

Crumpling paper is an example of a physical change.

Front

What happens to the properties of substances during a chemical change?

Back

The properties of the original substances change, and new properties emerge in the new substances.