Separating Mixtures

Which set of procedures would be best to follow when separating a mixture of sand, salt, and water?

• Evaporate the liquid to separate the water, then Heat the solid mixture to separate the salt.

• Pour the mixture through a filter to separate the sand, then, Evaporate the liquid to separate the salt.

• Heat the mixture on a hot plate to separate the sand then, cool the liquid to separate the salt.

• Pour mixture into a bowl to separate the water, then Use a hand lens to separate the sand and salt.

A solution is a special kind of mixture. Some substances can dissolve in water; some substances cannot. Which of the following objects will dissolve in a solution of water?

• Sugar

• Oil

• Penny

• Marble

Sugar cubes are being dissolved in a beaker of water. The sugar will dissolve faster if which of the following changes is made?

• Use larger sugar cubes

• Stir the mixture

• Freeze the water

• Replace the beaker

A mixture of sand and pebbles is placed in a sieve, like the one shown here. The sand passes through the small holes in the sieve, while the pebbles remain in the sieve. The sieve was used to separate sand and pebbles based on which property?

• Size

• Weight

• Color

• Mass

For an assignment, Mrs. Thompson has asked students to choose a material that will dissolve in a beaker of water. Which of the following would be the correct material to choose to meet the requirements of the assignment?

• Cement

• Oil

• Metal

• Salt

Tags

NGSS.MS-PS1-2

Victor is building a sand castle at the beach and finds that the sand has many small pebbles in it. Which procedure would be best for Victor to use to separate the small pebbles from the sand?

• Pour the sand and pebbles through a screen with small holes

• Put the sand in a bucket and stir it for a few seconds

• Allow the sand and pebble mixture to sit out in the hot sun

• Add more sand that has fewer pebbles

Hayden added salt to a glass of water. After 10 minutes, the salt was completely dissolved. An image is provided. The time to dissolve may be shortened to 5 minutes by making which of the following changes?

• Using a larger glass

• Replacing the spoon

• Heating the water

• Adding ice to the water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Julia has a large collection of red, blue, and green marbles in a bag. She separates the red, blue, and green marbles into three different cups. Julia separated the marbles based on which property?

• Size

• Color

• Weight

• Mass

Tags

NGSS.5-PS1-3

Some materials, when mixed with water, will change properties and dissolve. The rate at which a substance dissolves in water can be altered by which of the following?

• Increase in temperature

• Using a filter

• Allowing it to settle

• Adding ice to the water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A mixture of sand and iron filings are in a bowl. How could the mixture be separated?

• Dissolving in water

• Using a filter

• Heating the mixture

• Using a magnet