Chemical Changes

Front

What is a chemical change?

Back

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

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

What is evidence of a chemical change?

Back

Unexpected color change, gas produced, light produced, and formation of a precipitate.

Front

What is a precipitate?

Back

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

Front

Is cutting an orange a physical or chemical change?

Back

Physical change.

Front

Is melting ice a chemical or physical change?

Back

Physical change.

Front

What is an example of a chemical change?

Back

Burning wood, rusting iron, or baking a cake.

Front

What is an example of a physical change?

Back

Melting ice, boiling water, or dissolving sugar in water.

Front

What happens during a chemical change?

Back

Atoms rearrange to form new substances.

Front

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

Back

Chemical changes create new substances; physical changes do not.