Physical vs. 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. Examples include rusting, burning, and photosynthesis.

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, resulting in new substances being formed.

Front

Can physical changes be easily reversed?

Back

Yes, physical changes can often be easily reversed, such as freezing and melting water.

Front

Can chemical changes be easily reversed?

Back

No, chemical changes are usually not easily reversible.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

A plant collecting sunlight and turning it into food is an example of a chemical change.

Front

What is the significance of the Statue of Liberty turning green?

Back

It is an example of a chemical change due to the reaction of copper with oxygen and moisture in the air.

Front

What type of change formed the Grand Canyon?

Back

The changes that formed the Grand Canyon were physical changes, primarily due to erosion.