Physical and Chemical Changes

Front

What is a chemical change?

Back

A process where one or more new substances are created, often accompanied by signs such as gas formation, color change, or temperature change.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or freezing.

Front

What is an example of a sign that a chemical reaction has occurred?

Back

Formation of a gas.

Front

What happens to the temperature when two liquids of the same temperature are mixed and a temperature increase is observed?

Back

This indicates a chemical change.

Front

What are physical properties?

Back

Characteristics that can be observed or measured without changing the substance's identity, such as conductivity, freezing point, boiling point, and solubility.

Front

What is an example of a chemical change?

Back

Fireworks exploding.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not create new substances, while chemical changes do.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is the boiling point?

Back

The temperature at which a liquid turns into a gas.

Front

What is solubility?

Back

The ability of a substance to dissolve in another substance, typically in a liquid.