Mixtures

Which of the following is a mixture?

• sand and rocks

• steel nails and brass bolts

• berries, bananas, and melon fruit salad

• all of the above

A company collects cans for recycling. Some cans are made of aluminum, and some are made of iron. Which of

the following is the best way to separate the two types of cans?

• Heat the iron cans until they melt.

• Float the cans in water.

• Use a magnet to pick up the iron cans.

• Use scissors to cut the cans.

Carbon powder and iron filings are both black powders. When mixed together, they look like one black powder. Which of these would be best to use to separate the iron filings from the carbon powder?

• A magnet

• Heat

• A magnifying glass

• Water

What is true about all mixtures?

• They can all be eaten.

• They must contain all states of matter.

• They are only solids.

• They have two or more substances mixed together.

What physical property of matter was used to separate the candy mixture?

• size

• taste

• shape

• color

A substance

• can be a solid.

• can be a liquid.

• can be a gas.

• can be all of the above.

Which two tools would be used to separate items of different sizes?

• magnifying glass and hands

• strainer and sieve

• magnet and microscope

• all of the above

True or False?

A mixture is a combination of two or more substances.

• True

• False

Which of the following is not an example of a mixture.

• salad

• trailmix

• plastic paper clips and metal paper clips

• cheerios

What would be the best tool to separate these mixtures?

• hands

• microscope

• magnet

• strainer