Classification of Matter

True/False: During a physical change the chemical composition changes.

• True

• False

True/False: In a chemical change, chemical bonds must form and break to form new substances

• True

• False

Forming water from hydrogen gas and oxygen gas is a form of

• chemical change

• physical change

What is a PURE substance?

• A substance that cannot be separated into other substances by any physical process

• A substance that can be separated into other substances by physical means

An element

• cannot be broken down to any other forms by chemical or physical means

• can be broken down into smaller parts

A mixture

• is made up of two or more pure substances

• Cannot be separated by physical processes

Which mixture is distributed evenly?

• Homogenous

• Heterogenous

Chemical or Physical Change:

Dew condensing on a leaf

• chemical

• physical

Chemical or Physical Change:

A metal pipe rusts

• chemical

• physical

Chemical or Physical Change:

Chopping firewood

• chemical

• physical