Chemical Changes

Front

What is a chemical change?

Back

A change where one or more new substances are created.

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 type of change occurs when a new substance is formed?

Back

Chemical Change.

Front

Is cutting an orange into wedges a physical or chemical change?

Back

Physical Change.

Front

What is a physical change?

Back

A change that does not create a new substance.

Front

Give an example of a chemical change.

Back

Rust forming on iron.

Front

What happens to the molecules during a chemical change?

Back

They rearrange to form new substances.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an example of a physical change?

Back

Melting ice.