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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

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

Burning wood is an example of a chemical change.

Front

What happens to the identity of a substance during a physical change?

Back

The identity of the substance remains the same during a physical change.

Front

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

Back

The identity of the substance changes during a chemical change.

Front

What is rusting an example of?

Back

Rusting is an example of a chemical change.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters physical properties without changing the substance's identity, while a chemical change results in new substances being formed.

Front

What is an example of a chemical change that occurs in the human body?

Back

Food being broken down by enzymes in your stomach is an example of a chemical change in the body.

Front

What happens when sodium reacts with chlorine?

Back

A new compound, salt, is formed when sodium reacts with chlorine.