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 melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes processes like rusting, burning, and baking.

Front

What is an example of a chemical reaction?

Back

Cookies baking in an oven is an example of a chemical reaction.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Dissolving sugar in water is an example of a physical change.

Front

True or False: Rust on an iron bar is an example of a chemical change.

Back

True.

Front

True or False: Cutting a log into small pieces is a chemical change.

Back

False.

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas is a sign that a chemical reaction has occurred.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.

Front

Give an example of a physical change.

Back

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