Matching (Value 10)
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Match each item with the correct statement below. a. | mixture | d. | reactant | b. | product | e. | heterogeneous mixture | c. | phase | f. | vapor |
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1.
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gaseous state of substance that is a liquid or solid at room
temperature
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2.
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a physical blend of two or more components
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3.
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part of a sample having uniform composition and properties
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4.
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not uniform in composition
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5.
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a substance formed in a chemical reaction
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6.
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starting substance in a chemical reaction
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Match each item with the correct statement below. a. | distillation | d. | compound | b. | mass | e. | element | c. | chemical
reaction | f. | homogeneous
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7.
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amount of matter an object contains
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8.
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describes mixture with a uniform composition
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9.
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substance that cannot be changed into simpler substances by chemical
means
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10.
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composed of two or more substances chemically combined in a fixed
proportion
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Multiple Choice (Value 24)
Identify the choice that best completes the statement or answers
the question.
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11.
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A golf ball has more mass than a tennis ball because it ____.
a. | takes up more space | c. | contains different kinds of matter | b. | contains more
matter | d. | has a definite
composition |
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12.
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An example of an extensive property of matter is ____.
a. | temperature | c. | mass | b. | pressure | d. | hardness |
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13.
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Which of the following is NOT a physical property of water?
a. | It has a boiling point of 100 C. | b. | It is a colorless
liquid. | c. | It is composed of hydrogen and oxygen. | d. | Sugar dissolves in
it. |
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14.
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A vapor is which state of matter?
a. | solid | c. | gas | b. | liquid | d. | all of the
above |
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15.
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Which state of matter is characterized by having a definite shape and a definite
volume?
a. | gas | c. | solid | b. | liquid | d. | all of the
above |
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16.
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Which state of matter expands when heated and is easy to compress?
a. | gas | c. | solid | b. | liquid | d. | all of the
above |
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17.
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Which of the following is a physical change?
a. | corrosion | c. | evaporation | b. | explosion | d. | rotting of food |
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18.
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Which of the following is true about homogeneous mixtures?
a. | They are known as solutions. | b. | They consist of two or more
phases. | c. | They have compositions that never vary. | d. | They are always
liquids. |
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19.
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Which of the following is a heterogeneous mixture?
a. | vinegar in water | c. | oil and vinegar | b. | milk | d. | air |
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20.
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Which of the following is a homogeneous mixture?
a. | salt water | c. | sand and water | b. | beef stew | d. | soil |
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21.
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Which of the following materials is a substance?
a. | air | c. | stainless steel | b. | gasoline | d. | silver |
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22.
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What is one difference between a mixture and a compound?
a. | A compound consists of more than one phase. | b. | A compound can only
be separated into its components by chemical means. | c. | A mixture can only be separated into its
components by chemical means. | d. | A mixture must be uniform in
composition. |
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23.
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What distinguishes a substance from a mixture?
a. | Substances are compounds, and mixtures are not. | b. | Mixtures are
groupings of elements, and compounds are not. | c. | Samples of the same substance can have
different intensive properties. | d. | Mixtures can be separated physically, while
compounds cannot. |
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24.
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Which of the following represents a compound?
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25.
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The chemical formula of a compound does NOT indicate the ____.
a. | identity of the elements in the compound | b. | how elements are
joined in the compound | c. | the composition of the
compound | d. | relative proportions of the elements in the compound |
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26.
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Which substance has a chemical symbol that is derived from a Latin name?
a. | calcium | c. | oxygen | b. | hydrogen | d. | potassium |
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27.
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In the chemical reaction in which sucrose is heated and decomposes to form
carbon dioxide and water, which of the following is a reactant?
a. | sucrose | c. | water | b. | carbon dioxide | d. | heat |
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28.
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Which of the following is NOT a physical change?
a. | grating cheese | c. | fermenting of cheese | b. | melting cheese | d. | mixing two cheeses in a
bowl |
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29.
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Which of the following does NOT involve a physical change?
a. | mixing | c. | grinding | b. | melting | d. | decomposing |
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30.
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What must be done to be certain that a chemical change has taken place?
a. | Check for the production of bubbles before and after the change. | b. | Demonstrate that a
release of energy occurred after the change. | c. | Check the composition of the sample before and
after the change. | d. | Demonstrate that energy was absorbed by the
reactants after the change. |
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31.
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Which of the following indicates that a chemical change has happened during
cooking?
a. | The food darkens. | b. | Bubbles form in boiling
water. | c. | Butter melts. | d. | Energy is transferred from the stove to a
pan. |
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32.
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Which of the following does NOT indicate that a chemical change may have taken
place?
a. | fracture formation | c. | precipitate formation | b. | gas
production | d. | energy
transfer |
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33.
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What happens to matter during a chemical reaction?
a. | Matter is neither destroyed or created. | b. | Some matter is
destroyed. | c. | Some matter is created. | d. | Some matter is destroyed and some is
created. |
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34.
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Which of the following is true for all chemical reactions?
a. | The total mass of the reactants increases. | b. | The total mass of
the products is greater than the total mass of the reactants. | c. | The total mass of
the products is less than the total mass of the reactants. | d. | The total mass of
the reactants equals the total mass of the products. |
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Numeric Response (Value 2)
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35.
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What is the melting point of water in degrees Celsius?
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36.
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Approximately how many elements exist in nature?
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