Physical and Chemical Changes Formative

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

What is a chemical change?

Back

A chemical change is a change that occurs when one or more substances produce new substances with different properties.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Frying an egg is an example of a chemical change.

Front

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

Back

The properties of substances change because new substances with different properties are formed.

Front

Is rusting a physical or chemical change?

Back

Rusting is a chemical change.

Front

What is the main difference between physical and chemical changes?

Back

The main difference is that physical changes do not create new substances, while chemical changes do.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as freezing and melting.

Front

Can a chemical change be reversed?

Back

Chemical changes are usually not reversible by simple physical means.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.