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 changes the composition of the substance. Examples include burning, rusting, and cooking.

Front

Is burning wood a physical or chemical change?

Back

Chemical change.

Front

Is melting ice a physical or chemical change?

Back

Physical change.

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

Ripping paper.

Front

Give an example of a chemical change.

Back

Cookies baking in an oven.

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.

Front

Is souring milk a physical or chemical change?

Back

Chemical change.