mixtures and solutions

Question 2

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

Answer 2

A. Sieve

Question 3

Which of the images shows a solution?

Answer 3

D. Lemonade

Question 4

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

Answer 4

A. are magnetic.

Question 5

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

Answer 5

D. can be evaporated.

Question 6

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

Answer 6

A. The purple color of the solution was lighter.

Question 7

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

Answer 7

D. Mixtures 1, 2, and 4 only

Question 8

A saltwater solution can be separated easily because—

Answer 8

A. salt evaporates when boiled, leaving behind water.

Question 9

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

Answer 9

B. Mixture 2

Question 10

What did the student most likely observe after 2 weeks?

Answer 10

D. Only 20 grams of mixed sand and salt remain in the beaker.

Question 11

What is the volume of the solution created by mixing 20 mL of lemon juice and 30 mL of honey into 300 mL of warm water?

Answer 11

C. 320 mL

Question 12

Which of the methods would allow you to quickly separate a mixture of steel paper clips and plastic paper clips?

Answer 12

B. Method 4 only

Question 13

In which mixture do the ingredients not change color?

Answer 13

B. Mixture 2

Question 14

How did the solution most likely appear after more powdered drink mix was added?

Answer 14

D. The solution had a sweeter taste.

Question 15

What question is the student most likely trying to answer with this investigation?

Answer 15

C. How does the amount of water affect dissolving time?

Question 16

Which statement is true about the mixture?

Answer 16

A. The mass of the mixture is 110 grams.

Question 17

Which of the mixtures can be separated by placing the mixture in a beaker of water?

Answer 17

B. Mixture 2 because plastic beads float and glass beads sink.

Question 18

What is the mass of the entire salad mixed by the chef?

Answer 18

D. 375 grams

Question 19

Which properties of the solution changed as the ice melted?

Answer 19

C. The temperature of the solution

Question 20

What question is the student most likely trying to answer with this investigation?

Answer 20

B. How does the temperature affect the amount of time it takes for the solute to dissolve?