Pure Substances and Mixtures Worksheet

Which of the following are pure substances?

• solutions

• compounds

• homogeneous mixtures

• colloids

Which of the following is NOT a pure substance?

• milk

• oxygen

• water

• carbon dioxide

A substance that is made up of only one kind of atom is a(an)

• compound

• homogeneous mixture

• element

• solution

If an unknown substance CANNOT be broken down into simpler substances, it is

• compound

• an element

• made of one kind of atom

• both b and c

What is the symbol for aluminum?

• AL

• Al

• Au

• A

The symbol for gold is

• Au

• Al

• Gl

• Go

If a material contains three elements joined in a fixed proportion, it is a(an)

• mixture

• solution

• atom

• compound

Water is a compound because it

• can be broken down into simpler substances.

• always has two hydrogen atoms for each oxygen atom.

• is made of water atoms joined together.

• both a and b

Which of the following is a mixture?

• carbon dioxide

• silicon

• silicon dioxide

• sand

Which of the following is a characteristic of a mixture?

• has varying properties

• has a fixed composition

• contains only pure substances

• both a and b