Question 1

A student pours 14 grams of sugar into a jar filled with 500 milliliters of water. The student thoroughly stirs the sugar and water to make a solution.

Which change most likely occurs to the sugar when it is added to the water?

Accepted Answer

The sugar completely dissolves in the solution.

Answer

The sugar changes water into a new substance in the solution.

Answer

The sugar breaks down to form a new substance in the solution.

Answer

The sugar floats on the surface of the water in the solution.

Question 2

Which change occurs when lemon juice is mixed with water?

Accepted Answer

The lemon juice dissolves and spreads out evenly in the water.

Answer

The water becomes a solid.

Answer

The mass of the lemon juice decreases.

Answer

The volume of the water decreases.

Question 3

A beaker with 115 mL of solution has a temperature of 21°C. The solution contains 5 g of salt and 115 mL of water. Students added two ice cubes to the solution and stirred the solution with a stirring rod.

Which properties of the solution changed as the ice cubes melted?

Accepted Answer

The temperature, mass, and volume of the solution

Answer

The color and physical state of the solution

Answer

The volume, temperature, and mass of the salt in the solution

Answer

The physical state and temperature of the solution

Question 4

A student stirs 15 grams of each substance listed below into 200 milliliters of water to form four different mixtures. The student then tries to separate the water from each mixture by pouring the mixture through a kitchen tea strainer.

Which mixture can the student separate most easily with the strainer?

Accepted Answer

Gravel and water

Answer

Sugar and water

Answer

Salt and water

Answer

Shampoo and water

Question 5

Some ways to separate mixtures are listed below.  A student is given a beaker containing gravel and water. Which of these ways could the student NOT use to separate the gravel from the water?

Accepted Answer

2

Answer

4

Answer

3

Answer

1

Question 6

For an investigation a student put 100 mL of water at room temperature into each of three beakers. Then the student added a coin to Beaker R, 3 g of a powdered drink mix to Beaker S, and 10 mL of lamp oil to Beaker T. The student stirred the contents of the beakers and then left them sitting on a lab table for 5 minutes. Which diagram shows what the student most likely observed in each of the beakers after 5 minutes?

Accepted Answer

#texas/60125df2-ad6d-427a-8aff-01ae2dd4b178/C.png

Answer

#texas/60125df2-ad6d-427a-8aff-01ae2dd4b178/B.png

Answer

#texas/60125df2-ad6d-427a-8aff-01ae2dd4b178/A.png

Answer

#texas/60125df2-ad6d-427a-8aff-01ae2dd4b178/D.png

Question 7

Which of these is not soluble in water?

Accepted Answer

Oil

Answer

Honey

Answer

Sugar

Answer

Salt

Question 8

A student combined powdered paint with water to make a small amount of a blue liquid paint mixture. The student left the paint mixture in an open container. Several days later the student found the container and observed that changes had occurred. What most likely happened to the mixture?

Accepted Answer

The water evaporated, leaving only a dry blue solid in the container.

Answer

The container was empty after the mixture evaporated into the air.

Answer

The liquid paint mixture was lighter in color after some water evaporated.

Answer

The paint evaporated, leaving only clear water in the container.

Question 9

A student adds 10 grams of four different powdered solids into four different beakers. The student then adds 100 mL of water to each beaker, stirs the mixtures, and allows them to sit for half an hour before recording observations. Which question is the student most likely trying to answer with this investigation?

Accepted Answer

Which substances dissolve in water?

Answer

How much water is needed to cause a substance to change state?

Answer

At what water temperature do the substances dissolve?

Answer

What causes a substance to sink when put in water?

Question 10

Some people add sugar to their hot tea. Which property of the sugar remains the same when the sugar is in the tea solution?

Accepted Answer

The taste of the sugar

Answer

The texture of the sugar

Answer

The size of the sugar crystals

Answer

The color of the sugar

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