Mixture and Solutions STAAR Review

Which tool or technique would best separate a mixture of gravel and sand?

• Sieve

• Paper filter

• Magnet

• Evaporation

Which of the images shows a solution?

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Tags

NGSS.MS-PS1-2

A mixture of pencils and pens can be separated easily because both pencils and pens -

• Are magnetic

• Can pass through a sieve

• Are solid

• Can be evaporated

Which tool would best separate a mixture of iron filings and salt?

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Tags

NGSS.MS-ETS1-2

A student dissolved powdered drink mix in cold water to form a sweet, purple, grape-flavored solution. To make the solution taste less strong, the student added more water to the solution.

How did the physical properties of the solution change when more water was added?

• the purple color of the solution was lighter

• the taste of the solution is sweeter

• the solution melted

• the solution's volume decreased

Tags

NGSS.MS-PS1-2

Which of the mixtures can be separated using a kitchen strainer?

• Mixture 3 only

• Mixture 2 only

• Mixtures 1 and 4 only

• Mixtures 1, 2 and 4 only

A saltwater solution can be easily separated because -

• salt evaporates when boileed, leaving behind the water

• salt can be removed from the solution using tweezers

• water evaporates when boiled, leaving behind the salt

• water passes through a sieve, leaving behind the salt

Tags

NGSS.MS-PS1-4

Which mixture CANNOT be separated by pouring the mixture through a paper filter?

• Mixture 1

• Mixture 2

• Mixture 3

• Mixture 4

A student mixed together 10 grams of salt, 10 grams of sand, and 500 milliliters of water in a beaker. After stirring, the student allowed the mixture to sit for 20 minutes before recording observations.

What did the student most likely observe?

• Both the salt and the sand settled to the bottom of the beaker

• Both the sand and salt dissolved in water.

• The salt floated while the sand sank.

• The salt dissolved and the sand settled to the bottom of the beaker.

Tags

NGSS.MS-PS1-2

A beach is made up of minerals, tiny shells and skeletons of marine life, and even microscopic pieces of plastic.

Which statement correctly describes this mixture?

• The ingredients in the mixture dissolve to form a solution.

• The ingredients in the mixture maintain their physical properties.

• The mixture includes solutes and a solvent.

• The mixture can be easily separated using evaporation.