MIXTURES AND SOLUTIONS

A sieve is a wide container with a flat bottom. The bottom has many small holes, all the same size.

Which of the following mixtures could be separated using a sieve?

• A Nuts and raisins

• B Salt and pepper

• C Sand and gravel

• D Aluminum nails and iron nails

Which of the following mixtures could be separated by using only evaporation?

• A Oil and water

• B Sand and gravel

• C Water and sugar

• D Sugar and salt

A student filled two containers with 50 mL of water and added 10 mg of sand to the first one and 10 mg of salt to the second. What is the difference between these two mixtures?

• A Only Mixture 1 begins with a liquid and a solid.

• B Only Mixture 2 can be separated with a magnet.

• C In Mixture 1 only, the solid will float on the water.

• D In Mixture 2 only, the properties of the solid change.

Students created four mixtures. Which of the four mixtures could be separated using the following procedures? Step 1: Place the mixture in a basin of water and scoop out what floats on the water. Step 2: Dry off the remaining mixture and use a magnet to separate the last two components.

• Mixture 1

• Mixture 2

• Mixture 3

• Mixture 4

Students created two mixtures. Mixture 1 is different from Mixture 2 because only in Mixture 1 -

• A is there any liquid

• B will there remain a solid

• C was there any dissolving

• D did ingredients stay the same

To break down and spread out evenly in a liquid

• dissolve

• separate

• mix