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?
A. Cereal
B. Pizza
C. Sieve
D. Paper filter
A mixture of pencils and pens can be separated easily because both pencils and pens —
one magnetic.
cannot pass through a sieve.
are solid.
cannot be evaporated.
Which tool would best separate a mixture of iron filings and salt?
A
B
C
D
Question 5
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Question 6
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Question 7
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Question 8
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Question 9
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Question 10
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Question 11
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Question 12
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Question 13
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Question 14
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Question 15
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Question 16
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Question 17
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Question 18
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Question 19
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Question 20
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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 change when more water was added?
A. The purple color of the solution was lighter.
B. The taste of the solution was sweeter.
C. The solution melted.
D. The solution’s volume decreased.
Four mixtures are listed below.
1. Grapes and water
2. Sugar and water
3. Grapes and blueberries
4. Blueberries and water
Which of the mixtures can be separated using a kitchen strainer?
A. Mixture 3 only
B. Mixture 2 only
C. Mixtures 1 and 4 only
D. Mixtures 1, 2, and 4 only
A saltwater solution can be separated easily because —
A. salt evaporates when boiled, leaving behind water.
B. salt can be removed from the solution using tweezers.
C. water evaporates when boiled, leaving behind salt.
D. water passes through a sieve, leaving behind the salt.
See the table in question 8. Which mixture cannot be separated by pouring the mixture through a paper filter?
A. Mixture 1
B. Mixture 2
C. Mixture 3
D. 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 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.
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.
Mixture Separation Methods
1. Use tweezers
2. Boil the mixture to evaporate the water
3. Use a sieve
4. Pass a magnet over the mixture
Which of the methods would separate a mixture of steel paperclips and plastic paper clips?
Methods 1 and 4 only
Method 4 only
Methods 1, 3, and 4 only
Method 2 only
The table lists the ingredients of four mixtures.
1. Powdered paint mix and water
2. Lemon juice and water
3. Iron filings and sand
4. Red drink mix and water
In which mixture do the ingredients not change color?
Mixture 1
Mixture 2
Mixture 3
Mixture 4
(see image above)
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>
A
B
C
D
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.
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?
A student mixed rocks and gravel. The table shows the mass and volume of each ingredient before they mixed the sample.
Rocks 80g 40mL
Gravel 60g 50mL
The mass of the mixture is 110 grams.
The mass of the mixture is 90 milliliters.
The volume of the mixture is 140 grams.
The volume of the mixture is 90 milliliters.
Three mixtures are listed.
1. Corks and ping pong balls
2. Plastic beads and glass beads
3. Iron nails and gravel
Which of the mixtures can be separated by placing the mixture in a beaker of water?
A. Mixture 1 because corks float in water and ping pong balls sink
B. Mixture 2 because plastic beads float and glass beads sink
C. Mixture 3 because iron nails and gravel both sink in water
D. Mixture 1 because corks and ping pong balls both float in water
Bronze, like the material used to make third place medals, is primarily made of copper, but also contains tin. When a small amount of melted tin is mixed into melted copper, liquid bronze forms. When it cools, bronze is a solid.
Which statement is true?
A. In bronze, copper is the solute and tin is the solvent.
B. The bronze in a medal is a solid solution.
C. Bronze is a mixture, but not a solution.
D. The bronze in a medal is a liquid solution.
A student dissolved 10 g of powdered drink mix in 500 mL of water to form a sweet, green, lime-flavored solution. Then, the student added 4 ice cubes to the solution and stirred to melt the ice.
Which properties of the solution changed as the ice melted?
A. The physical state of the solution
B. The mass of the powdered drink mix
C. The temperature of the solution
D. The volume of the powdered drink mix
A student mixed 5 grams of sugar in a beaker containing 100 milliliters of cold water. The student also mixed 5 grams of sugar in a beaker containing 100 milliliters of hot water. The student stirred the mixtures and recorded the amount of time it took for each to dissolve. What question is the student most likely trying to answer with this investigation?
A. At what temperature does sugar dissolve?
B. How does the temperature affect the amount of time it takes for the solute to dissolve?
C. How does the mass of a solute affect the amount of time it takes to dissolve?
