Chemical vs. Physical 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 changing its chemical composition. Examples include melting, freezing, and blending.

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 cooking.

Front

Is blending fruits together a chemical or physical change?

Back

Blending fruits together is a physical change.

Front

What happens to gallium when it melts?

Back

When gallium melts, it turns into a puddle of gallium metal, which is a physical change.

Front

What gas is produced when candles burn?

Back

When candles burn, carbon dioxide is produced.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood.

Front

Is mixing air into egg whites a physical or chemical change?

Back

Mixing air into egg whites is a physical change.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Front

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

Back

During a chemical change, the properties of a substance change because new substances are formed.

Front

Can a physical change be reversed?

Back

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