Chemical Changes

Front

What is a chemical change?

Back

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

Front

Can most chemical changes be reversed?

Back

No, most chemical changes cannot be reversed.

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas.

Front

What provides evidence of a chemical change?

Back

Wood is burned releasing ash and smoke.

Front

What is created during a chemical change?

Back

One or more new substances.

Front

What is a physical change?

Back

A change that does not result in the formation of new substances.

Front

Is melting a chemical change?

Back

No, melting is a physical change.

Front

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

Back

The properties of the original substances change to form new substances.

Front

What is an example of a chemical change?

Back

Rust forming on iron.

Front

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

Back

A chemical change results in new substances, while a physical change does not.