Mixtures vs pure substances

Air is a...

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

Potassium, or K, is a...

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

A bowl of cereal is a...

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

If it can be physically separated it is a...

• Mixture

• Pure Substance

If it has uniform composition it is a...

• Homogeneous mixture

• Heterogeneous mixture

Air that is 70% Oxygen, 20% Nitrogen, and 10% carbon is a(n)...

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

Tags

NGSS.MS-PS1-1

If something is made of one kind of atom it is.....

• pure substance

• mixture

If you pour a mixture of sand, salt, and water through filter paper, what would be left on the filter paper?

• water

• sand

• salt

If a mixture of iron and

sulfur mixture is heated strongly, iron (II) sulfide forms, which is no longer magnetic and cannot be

separated by physical methods. What is iron (II) sulfide?

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Aluminum is a(n)...

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture