True/False ---
Indicate whether the statement is true or false.
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1.
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On Earth, a pound of feathers has the same weight as a pound of lead.
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2.
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The relationship between the mass and volume of an object is its weight.
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3.
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The volume of an object is due to the space taken up by atoms of the
object.
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4.
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Matter that has the ability to flow is called a fluid.
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5.
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When the buoyant force on a ball is less than the weight of the ball, the ball
will float.
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6.
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A block of plastic is dropped into a tub of water. If the buoyant force on the
block is greater than the weight of the block, the block will float.
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7.
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Buoyancy states that less dense objects will float in more dense liquids.
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8.
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If you weigh 90 kg on earth you would also weigh 90 kg on Jupiter since your
mass does not change when you are in a different gravity environment.
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9.
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A newton is a measurement of mass on other planets that have a different
gravitational pull, but we don’t really use it on Earth.
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Multiple Choice -- Identify the choice that best completes the
statement.
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10.
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The space that an object takes up is known as its:
a. | density. | b. | volume. | c. | weight. | d. | mass. |
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11.
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The density of an object equals its:
a. | mass ÷ volume. | b. | mass ´ volume. | c. | volume ÷
mass. | d. | volume + mass. |
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12.
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| Material | Density | | Wood | 0.9 g/cm3 | | Glass | 2.3 g/cm3 | | Aluminum | 2.7 g/cm3 | | Iron | 7.8 g/cm3 | | |
A block has a mass of
78 grams and a volume of 10 cm 3. Using the table above, what material is the block made
of? a. | Wood | b. | Glass | c. | Aluminum | d. | Iron |
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13.
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By adding more aluminum to an aluminum block, you:
a. | increase its density. | b. | decrease its density. | c. | decrease its mass. | d. | do not change its
density. |
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14.
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Mass is measured in:
a. | inches and feet. | b. | pounds and ounces. | c. | kilograms and grams. | d. | cubic
centimeters. |
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15.
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Which of the following measures the pulling force of gravity on an
object?
a. | Volume | b. | Weight | c. | Mass | d. | Distance |
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16.
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 What is the volume of this box with dimensions
of 5 cm ´ 3 cm ´ 2 cm? a. | 10 cm | b. | 10 cm3 | c. | 30 cm | d. | 30
cm3 |
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17.
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Matter that has the ability to flow is a:
a. | fluid. | b. | gas. | c. | liquid. | d. | All of the
above |
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18.
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The lifting force that causes an object to float is known as:
a. | density. | b. | buoyancy. | c. | volume. | d. | fluidity. |
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19.
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Density is typically measured in which SI units?
a. | g/cm | b. | g/cm2 | c. | g/cm3 | d. | g/cm4 |
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Figure 5-1A
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20.
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If the buoyant force on the ball in Figure 5-1A is greater than the weight of
the ball, the ball will:
a. | float. | b. | sink. | c. | have neutral
buoyancy. | d. | float and then sink. |
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21.
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If the buoyant force on the ball in Figure 5-1A is less than the weight of the
ball, then the ball will:
a. | float. | b. | sink. | c. | have neutral
buoyancy. | d. | float then sink. |
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22.
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If the buoyant force on the ball in Figure 5-1A equals the weight of the ball,
the ball will:
a. | float. | b. | sink. | c. | have neutral
buoyancy. | d. | float then sink. |
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23.
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If an object is less dense than the fluid it is placed in, it will:
a. | sink. | b. | float. | c. | drift in the middle of the
fluid. | d. | dissolve in the fluid. |
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24.
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If an object with a density of 2.0 g/cm3 is placed in a fluid with a
density of 1.9 g/cm3, the object will:
a. | float. | b. | sink. | c. | have neutral
buoyancy. | d. | dissolve in the fluid. |
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25.
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If an object in a tank of water has neutral buoyancy, you can conclude
that:
a. | the object is denser than water. | c. | the object’s density is equal
to that of the water. | b. | the object is less dense than
water. | d. | No conclusion can be
made. |
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26.
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If the force of gravity on Jupiter is greater than the force of
gravity on Earth, how would your mass on Jupiter compare to your mass on Earth?
a. | It would be greater. | c. | It would be the same. | b. | It would be
less. | d. | You can’t tell
without the numbers. |
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27.
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If the force of gravity on the moon is less than the force of gravity on
Earth, how would your weight on the moon compare to your weight on Earth?
a. | It would be greater. | c. | It would be the same. | b. | It would be
less. | d. | You can’t tell
without the numbers. |
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28.
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Calculate: What is the density of a gold ring that has a
volume of 1.55 cm3 and a mass of 29.95 g?
a. | 0.5 g/cm3 | b. | 4.65 g/cm3 | c. | 19.3
g/cm3 | d. | 21.7 g/cm3 |
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29.
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How does the density of a thin copper wire compare to a copper ring?
a. | It is higher. | c. | It is the same. | b. | It is lower | d. | You can’t tell without the
numbers. |
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30.
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In order to change the density of an object, you must:
a. | change its mass. | c. | change its mass OR volume. | b. | change its
volume. | d. | change its
shape. |
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31.
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When an object’s volume is made smaller and its mass remains the same, its
density:
a. | increases. | c. | remains the same. | b. | decreases. | d. | increases then
decreases. |
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32.
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High-density objects have:
a. | a large volume for their mass. | c. | a large volume for their
temperature. | b. | a small volume for their mass. | d. | a small volume for their
temperature. |
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33.
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If a low-density object is placed in a high-density fluid, the object
will:
a. | be able to push aside fluid equal to its mass. | b. | not be able to push
aside fluid equal to its mass. | c. | increase in density. | d. | decrease in
density. |
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34.
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Which of the following is NOT a fluid?
a. | Helium gas | b. | Maple syrup | c. | Brick | d. | Water |
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35.
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Calculate: A golf ball has a mass of 45.7 g. Its volume is
41 mL. What is its density?
a. | 1.11 g/mL | b. | 86.7 g/cm3 | c. | 4.7 g/cm3 | d. | 1.11 g/cm3 |
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36.
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Calculate: A racketball has a mass of 40.6 g. Its volume is
47.7 cm3. What is its density?
a. | 88.3 g/cm3 | b. | 1936.62
g/cm3 | c. | 7.1 g/cm3 | d. | .85 g/cm3 |
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37.
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An apple has a mass of 160.25 grams. Its volume is 163 mL. Does it sink or float
in water?
a. | sink | c. | suspended below the surface | b. | float | d. | I have no idea! |
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38.
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A lime has a mass of 88.05 grams. Its volume is 87 mL. Does it sink or float in
water?
a. | float | c. | suspended below the surface | b. | sink | d. | I have
no idea! |
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Matching
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| a. | density | d. | buoyancy | g. | displacement | j. | weight | m. | g/mL | | b. | mass | e. | float | h. | newton | k. | suspension | n. | atoms | | c. | volume | f. | sink | i. | neutral
buoyuancy | l. | g/cm3 | o. | density column | | | | | | | | | | |
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39.
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The relationship between the mass and volume of an object is
called.....
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40.
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If an object is less dense than the fluid it is placed in, it will
.....
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41.
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______ is created as fluid surrounds an object.
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42.
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The pulling force of gravity affects the measurement of .....
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43.
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On Jupiter you would need to measure weight using this unit .....
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44.
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A scuba diver needs to be able to float suspended in water. This is called
....
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45.
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Length (x) width (x) height = ?
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46.
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An object with a density of 1.5 g/mL would ______ in water.
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47.
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Adding more aluminum to a block of aluminum changes its mass and _____
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48.
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The density unit of measurement used with a displacement tank is ______
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| a. 0.19 g/mL | c. 0.79 g/mL | e. 1.33 g/cm3 | g. 2.79 g/cm3 | | b. 0.5 g/mL | d. 0.9 g/mL | f. 8.9 g/cm3 | | | | | |
 Consider this tank of water with 7 objects. 4 are floating. 3 have sunk to the
bottom. Match the densities listed above to the apparent behavior of the objects.
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49.
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If object #5 sank the quickest of the three colored objects. What is its
density?
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50.
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Identify the probable density of object #1.
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51.
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If object #7 was the last one to sink to the bottom, identify its
density.
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52.
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Identify the probable density of object #4.
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53.
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Identify the probably density of object #2.
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54.
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Identify the probably density of object #3
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55.
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Object #6 had the second fastest sink time. What is its density?
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