Name:    Practice Test - Density

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

Which of the following statements about density is TRUE?
 a. Density depends on mass and volume. c. Density is measured in milliliters. b. Density is weight per unit volume. d. Density is a chemical property.

2.

One way to compare the densities of oil and water is to pour the liquids into a glass container and observe how they
 a. change color. c. separate into layers. b. evaporate quickly. d. create an odor.

3.

The density of a particular substance is always the same at a given
 a. weight and mass. c. size and time. b. pressure and temperature. d. texture and state.

4.

You have 20 mL of liquid mercury. Liquid mercury has a density of 13.55 g/cm3. What is the mass of the mercury sample?
 a. 1.48 g c. 271 g b. 0.68 g d. 13.55 g

5.

Considering that gold is one of the densest substances on Earth, which would you rather carry around school in your backpack all day, a kilogram of gold or a kilogram of feathers?
 a. feathers, because your backpack would feel lighter b. gold, because your backpack would feel lighter c. gold, because it would take up less space in your backpack d. feathers, because they would take up less space in your backpack

6.

What is the density of a substance that has a mass of 5 g and a volume of 40 cm3?
 a. 0.125 g/cm3 c. 35 g/cm3 b. 8 g/cm3 d. 200 g/cm3

7.

A lead ball has a mass of 454 g. The density of lead is 11.35 g/cm3. What is the ball's volume?
 a. 0.025 cm3 c. 442.65 cm3 b. 40 cm3 d. 5,152.9 cm3

8.

What is the mass of a bar of gold that measures 15 cm ´ 8 cm ´ 4 cm and has a density of
19.32 g/cm3?
 a. 19.32 g c. 480 g b. 24.84 g d. 9,273.6 g

9.

A 120 g block of pine wood has a volume of 300 cm3. Would this block float on water?
(Hint: Water has a density of 1 g/cm3.)
 a. no, because the block is more dense than water b. yes, but a much larger block would not c. yes, because the block is less dense than water d. both (b) and (c)

10.

The design of a grease separator used by chefs is based on the property of
 a. solubility. c. inertia. b. weight. d. density.

11.

The kilogram is the basic metric unit of
 a. length. b. mass. c. weight. d. volume.

12.

The amount of space an object takes up is its
 a. volume. b. density. c. mass. d. length.

13.

A metal washer has a mass of 0.27 g and a volume of 0.1 cm3. What is its density?
 a. 0.027 g/cm3 b. 0.37 g/cm3 c. 2.7 g/cm3 d. 2.7 g/cm2

14.

When water fills a submarine’s flotation tanks, the overall density of the submarine
 a. decreases. b. stays the same. c. increases. d. reduces the buoyant force.

15.

Which of these substances is the LEAST dense?
 a. wood b. copper c. mercury d. rubber

16.

The mass per unit volume of a substance is its
 a. density. b. buoyancy. c. weight. d. fluid pressure.