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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The law of
conservation of mass states that the mass of all substances before a physical change equals
the mass of all the substances after the change. _________________________
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2.
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Colloids are
mixtures. _________________________
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3.
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Flammability
is a physical property. _________________________
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4.
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Distillation is a way to separate a mixture using the physical property of
boiling point. _________________________
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5.
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When
lightning converts oxygen gas, O2, into ozone, O3, it is a physical
change. _________________________
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6.
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Homogeneous
mixtures include colloids, solutions, and suspensions. _________________________
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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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7.
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Fog is an
example of a ____. a. | compound | c. | colloid | b. | substance | d. | solution | | | | |
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8.
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Three
examples of physical change are ____. a. | freezing of water, evaporation of gasoline, and rusting a
nail | b. | burning of gasoline,
rotting of an egg, and exploding fireworks | c. | boiling of water, bursting of a balloon, and crumpling a piece of
paper | d. | sawing of wood, crushing a can, and toasting a
marshmallow | | |
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9.
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____ is NOT
a homogeneous mixture. a. | Permanent-press fabric | c. | Gelatin | b. | Glue | d. | Vinegar | | | | |
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10.
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The shape of
an apple is a ____. a. | chemical property | c. | physical change | b. | physical
property | d. | chemical
change | | | | |
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11.
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When a log
burns in a fire, ____. a. | a physical change has occurred | c. | mass is gained | b. | new substances are
formed | d. | mass is
lost | | | | |
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12.
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____ is
another name for a homogeneous mixture. a. | Substance | c. | Solution | b. | Liquid | d. | Suspension | | | | |
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13.
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A ____ is
NOT a mixture. a. | colloid | c. | compound | b. | suspension | d. | solution | | | | |
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14.
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When two or
more substances are combined so each substance can be separated by physical means, the result is
a(n)____. a. | element | c. | mixture | b. | compound | d. | chemical change | | | | |
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15.
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The
scattering of light by colloids is called ____. a. | air pollution | c. | The Tyndall effect | b. | conservation | d. | 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 definition for the liquid. Record an N if that item could not be a valid
definition.
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16.
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solution of
a liquid in a liquid
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17.
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solution of
a solid in a liquid
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18.
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substance
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19.
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suspension
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20.
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colloid
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Matching
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Match
each term with the correct definitions below. a. | element | d. | compound | b. | mixture | e. | matter | c. | substance | | | | |
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21.
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has mass,
takes up space
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22.
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composition
definite
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23.
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two or more
elements combined
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24.
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composition
variable
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25.
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all atoms
the same
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