Chemical Changes

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new 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, change in color, or production of heat.

Front

What is a new substance?

Back

A substance that is formed as a result of a chemical change.

Front

What is a precipitate?

Back

A solid that forms when two liquids combine in a chemical reaction.

Front

Is melting ice a chemical or physical change?

Back

Physical change.

Front

What happens during a chemical change?

Back

Atoms rearrange to form new substances.

Front

What is an example of a chemical change?

Back

Burning wood, rusting iron, or baking a cake.

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.

Front

What is an example of a physical change?

Back

Melting ice or boiling water.