Physical and Chemical Changes

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. Examples include cutting, melting, and dissolving.

Front

What is a Chemical Change?

Back

A Chemical Change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and baking.

Front

What happens during a Physical Change?

Back

During a Physical Change, the form of a substance changes, but its chemical identity remains the same.

Front

What happens during a Chemical Change?

Back

During a Chemical Change, the original substances are transformed into one or more new substances with different properties.

Front

Give an example of a Physical Change.

Back

An example of a Physical Change is freezing water to make ice.

Front

Give an example of a Chemical Change.

Back

An example of a Chemical Change is lighting a match.

Front

What is density?

Back

Density is a physical property defined as mass per unit volume of a substance.

Front

Is cutting a piece of paper a Physical or Chemical Change?

Back

Cutting a piece of paper is a Physical Change.

Front

Is baking a cake a Physical or Chemical Change?

Back

Baking a cake is a Chemical Change.

Front

What is the best indicator of a Chemical Change?

Back

The formation of a new substance is the best indicator of a Chemical Change.