Unit 1 Matter Retest

1. Which of the images shows a solution?

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

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3. A student dissolved powdered drink mix in cold water to form a sweet, purple, grape-flavored solution. To make the solution’s taste less strong, the student added more water to the solution. How did the physical properties of the solution changed when more water was added?

• The purple color of the solution was lighter.
• The taste of the solution was sweeter.
• The solution melted.
• The solution’s volume decreased.

Tags

NGSS.MS-PS1-2

4. A saltwater solution can be separated easily because—

• salt evaporates when boiled, leaving behind water.
• salt can be removed from the solution using tweezers.
• water evaporates when boiled, leaving behind salt.
• water passes through a sieve, leaving behind the salt.

Tags

NGSS.MS-PS1-4

5. 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 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

6. 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.

7. The table lists the ingredients of four mixtures. In which mixture do the ingredients not change color?

• Mixture 1
• Mixture 2
• Mixture 3
• Mixture 4

Tags

NGSS.MS-PS1-2

8. A student mixed together an orange solution containing water, orange powdered drink mix, and sugar, as shown in the image. Then the student dissolved more orange powdered drink mix into the solution. How did the solution most likely appear after more powdered drink mix was added?

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Tags

NGSS.MS-PS1-2

9. A student dissolved powdered drink mix in water. The taste wasn’t strong or sweet enough, so the student added more powdered drink mix to the solution. Which of the following most likely occurred when more powdered drink mix was added?

• The solution became a solid.
• The solution was colder.
• The solution had a smaller volume.
• The solution had a sweeter taste.

Tags

NGSS.MS-PS1-2

10. A student mixed 5 grams of salt in a beaker containing 100 milliliters of water. The student also mixed 5 grams of sand in a different beaker containing 100 milliliters of water. After stirring, the student allowed the mixtures to sit for half an hour. What question is the student most likely trying to answer with this investigation?

• At what temperature do substances dissolve?
• Are salt and sand soluble in water?
• How does the amount of water affect dissolving time?
• How long does it take sand to dissolve?

Tags

NGSS.MS-PS1-2