Physical and Chemical Changes

Front

A chemical change _____________ the identity of the substance.

Back

changes

Front

Which of these is an example of a physical change?

Back

Dissolving sugar in water.

Front

Sugar dissolves in water is an example of a _____________.

Back

Physical Change

Front

Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat. This is an example of a _____________.

Back

Chemical Change

Front

Which of these is an example of a new substance being formed?

Back

A nail rusting.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

List one indicator of a chemical change.

Back

Color change, gas production, or temperature change.

Front

What happens to the molecules during a physical change?

Back

The molecules rearrange but do not change their chemical structure.

Front

What happens to the molecules during a chemical change?

Back

The molecules break apart and form new molecules.