Unit 2 Mixtures and Solutions Practice

Which of the following substances maintained their physical properties when mixed in water?

• Vinegar

• Oil

• Salt

• Sugar

What happened to the blue powder when mixed with water?

• It changed into a different substance.

• It melted into a liquid.

• It became hidden by the water.

• It spread evenly throughout the liquid as microscopic particles.

Tags

NGSS.MS-PS1-2

What happens to Kool-Aid when added to water?

• It reacts and colors the water.

• It becomes white and the water changes color.

• It evaporates and the water changes color.

• It dissolves and colors the water.

Tags

NGSS.MS-PS1-2

Which property of salt remains the same when it forms a solution with water?

• Taste

• Size of crystals

• Color

• Texture

How can you separate iron beads from a mixture of wood, glass, and iron beads?

• Use a magnet.

• Evaporate the liquid.

• Add water to the container.

• Throw the beads in the air.

Which tool is best for separating cork and pebbles?

• Magnet

• Beaker of water

• Colander

• Tweezers

What claim can you make about the changes in the matter sample after heating?

• It changed from a gas to a liquid.

• It changed from a solid to a liquid.

• It changed from a liquid to a gas.

• It changed from a solid to a gas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Why is the sugar not visible in water when it dissolves?

• It separates into tiny particles.

• The crystals are hidden by the water.

• It changes to a colorless crystal.

• It melts into the water.

Tags

NGSS.MS-PS1-2

In which mixtures do all substances maintain their physical properties?

• Iron filings and sand

• Water and sand

• Sugar and water

• Salt and water

What conclusion can be drawn if substance A dissolves in water but substance B does not?

• Substance A is soluble, substance B is not.

• Both substances are soluble.

• Substance B is soluble, substance A is not.

• Neither substance is soluble.