5.5B Mixtures 1

Which mixture below could be easily separated using a sieve? A B C D

• Sugar and water

• Pebbles and water

• Oil and water

• Salt and water

Which of the following is the correct definition of a mixture?

• Two or more substances are chemically combined and cannot be easily separated.

• Two or more substance are combined and one substance dissolves in the other substance.

• Two or more substances are combined, but they keep their original properties and can be easily separated.

• Two or more substances are chemically combined, but they are easily separated.

When you cook with salt, the salt dissolves into the food. What physical property of the salt remains the same after it dissolves?

• The white color of the salt

• The size of the salt crystals

• The shape of the salt crystals

• The taste of the salt

Tags

NGSS.MS-PS1-2

The beaker below contains a mixture of clay, wood and iron beads. What makes this mixture easy to separate?

• All of the beads float in water.

• All of the beads are the same material.

• All of the beads are solid.

• All of the beads are attracted to a magnet.

Tags

NGSS.MS-PS2-3

A teacher mixes salt and pepper together in a beaker and asks the students to separate the mixture. Which physical property can be used to separate this mixture?

• Magnetism

• Density

• Solubility

• Conduction

Which tool would be most useful in separating sand and water?

• 
• 
• 
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Tags

NGSS.3-5-ETS1-2

A student collects a mixture of dirt and rocks from the park near her house. What would be the best way to separate the two parts of the mixture?

• Pull the rocks out with a pair of tweezers

• Use a magnet to collect the rocks

• Dissolve the dirt in water and use filter paper to collect the rocks

• Pour the mixture through a sieve and collect the rocks

Several ways to separate mixtures are listed below:

A student is given a mixture of iron filings and sand.

1. Pour the mixture through filter paper.

2. Use a magnet to collect one part of the mixture.

3. Evaporate the water by boiling the mixture.

4. Use tweezers to collect one part of the mixture.

Which of the ways listed above is the best way to separate the mixture?

• 1

• 2

• 3

• 4