Mixtures and Solutions

Which of the following tools could be used to quickly separate a mixture of iron paper clips and sand?

• Magnet

• Hot plate

• Microscope

• Hand lens

What property of water changes after creating a solution of lemon juice and water?

• Shape

• Temperature

• Taste

• State

Tags

NGSS.MS-PS1-2

Which physical property of salt would stay the same in a mixture of salt and water?

• Color

• Shape

• Size

• Taste

Which of the following, if added to water, would change its shape?

• Glass

• Salt

• Sand

• Wood

Students collected data on four substances. If the same students were then given a mystery substance made of tan or brown crystals that dissolves in water, it could be –

• corn starch

• brown sugar

• white sugar

• sand

Tags

NGSS.MS-PS1-2

A glass beaker contains 100 milliliters of water into which 5 grams of salt was stirred. Which item should be used to separate this particular mixture?

• Triple beam balance

• Paper filter

• Hot plate

• Spring scale

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

• 1. Evaporate the liquid to separate the water.

  2. Heat the solid mixture to separate the salt.

• 1. Pour the mixture through a filter to separate the sand. 2. Evaporate the liquid to separate the salt.

• 1. Pour mixture into a bowl to separate the water.

  2. Use a hand lens to separate the sand and salt.

• 1. Heat the mixture on a hot plate to separate the sand. 2. Cool the liquid to separate the salt.

What tool would best help you sort iron bolts from aluminum bolts?

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Tags

NGSS.MS-PS2-3

A tablespoon of a substance is added to warm water and stirred. The result was that the substance could no longer be seen. We can conclude from the results that the substance –

• is less dense than water.

• heated the water.

• flavored the water.

• dissolved in water.

Tags

NGSS.MS-PS1-2

What tool can be BEST use to separate a mixture of rocks and wood chips?

• fingers

• twizzers

• magnet

• water