Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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1.
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Substances are either elements or mixtures. _______________
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2.
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The
odor of a substance is a physical property. _______________
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3.
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Smoke
is a compound. _______________
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4.
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A
substance can be separated into simpler parts through differences in their physical
properties. _______________
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5.
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The
law of conservation of mass states that the mass of all substances before a chemical change
equals the mass of all the substances after the change. _______________
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6.
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Colloids are mixtures. _______________
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7.
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The
freezing of water is a chemical change. _______________
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8.
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Homogeneous mixtures can be separated by physical properties.
_______________
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9.
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Air
pollution particles can be removed by coagulation. _______________
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10.
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A
fruit salad is a homogeneous mixture. _______________
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11.
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Color
is a physical property. _______________
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12.
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When
a firecracker explodes, mass is lost. _______________
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13.
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All air pollutants are a result of human activity.
_______________
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14.
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A
suspension is a homogeneous mixture. _______________
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15.
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The
breaking of a glass window is a physical change. _______________
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16.
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A
colloid consisting of aluminum oxide is used to remove pollutants from water.
_______________
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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17.
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Three
examples of physical change are _____. a. | boiling of water, bursting a balloon, and melting a
candle | b. | burning of gasoline, rotting of an egg, and exploding
fireworks | c. | freezing of water, evaporation of gasoline, and rusting a
nail | d. | sawing of wood,
crushing a can, and toasting a marshmallow | | |
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18.
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_____
is a substance. a. | Lemonade | c. | Seawater | b. | Soil | d. | Steam | | | | |
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19.
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The
color of ink is a _____. a. | chemical change | c. | physical change | b. | chemical
property | d. | physical
property | | | | |
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20.
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Smoke
is an example of a _____. a. | colloid | b. | mixture | c. | solution | d. | substance | e. | suspension | | |
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21.
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When
gasoline is burned in an engine, _____. a. | gasoline evaporates | c. | mass is lost | b. | mass is
gained | d. | new substances
are formed | | | | |
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22.
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_____
is another name for a homogeneous mixture. a. | Liquid | c. | Substance | b. | Solution | d. | Suspension | | | | |
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23.
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When
two or more substances are combined so each substance maintains its own properties, the result is
_____. a. | a chemical
change | c. | an
element | b. | a compound | d. | a mixture | | | | |
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24.
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_____
is used to remove particles from water. a. | Coagulation | c. | Suspension | b. | Burning | d. | Electricity | | | | |
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25.
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The
scattering of light by colloids is called _____. a. | air pollution | c. | suspension | b. | conservation | d. | the Tyndall
effect | | | | |
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26.
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_____
is NOT homogeneous. a. | A compound | c. | A solution | b. | An
element | d. | A
suspension | | | | |
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Yes/No
Indicate whether you agree with the sentence or
statement.
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You are given a flask that contains 250 mL of a clear, brown liquid. You shine a
light through the liquid, and no light beam is visible. In the following list of items, record a
Y if that item could be a valid inference for the liquid. Record an N if
that item could not be a valid inference.
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27.
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substance
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28.
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colloid
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29.
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solution of a solid in a liquid
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30.
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suspension
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31.
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solution of a liquid in a liquid
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Matching
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Match the labeled parts of Figure 9-1 to the correct terms
below.
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32.
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pure
element
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33.
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mixture of two elements
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34.
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pure
compound
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35.
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mixture of two compounds
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36.
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mixture of a compound and an element
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