PS.5.1.2 — Changes in Matter

Front

What is a physical change?

Back

A change that does not create a new substance. Example: melting ice, tearing paper.

Front

What is a chemical change?

Back

A change that creates a new substance with different properties. Example: rusting, burning.

Front

What are signs of a chemical change?

Back

Color change, odor, temperature change, gas (bubbles) forming.

Front

Is dissolving a physical or chemical change?

Back

A physical change—it does not create a new substance.

Front

Crushing a can—physical or chemical change?

Back

Physical change—the material stays the same.

Front

Is melting a physical or chemical change?

Back

A physical change—it does not create a new substance.

Front

Is boiling water a physical or chemical change?

Back

A physical change—the water changes state from liquid to gas but remains H₂O.

Front

Is freezing water a physical or chemical change?

Back

A physical change—the water changes state from liquid to solid but remains H₂O.

Front

What is an example of a chemical change in cooking?

Back

Baking a cake is a chemical change because it results in new substances being formed.