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Key Concepts
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1.
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A crackling fire burns in a fireplace. Its smoke rises up the chimney. Which of
these properties of the fire is a form of matter?
A. | the crackling sound | B. | the glowing light | C. | its
heat | D. | the smoke |
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2.
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The pull of gravity on a camera is the camera's
A. | mass. | B. | weight. | C. | volume. | D. | matter. |
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3.
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Which of these can be used to find the volume of a juice box?
A. | length · width · height | B. | mass ÷ volume | C. | mass · weight
· length | D. | mass ÷ weight |
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4.
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The basic unit of matter is
A. | a mixture. | B. | a substance. | C. | an
atom. | D. | a compound. |
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5.
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Two oxygen atoms bond with one carbon atom to form carbon dioxide. Carbon
dioxide is a(n)
A. | element. | B. | atom. | C. | molecule. | D. | mixture. |
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6.
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The atoms and molecules of a rock
A. | don't move at all. | B. | slide from place to place through the
rock. | C. | shake back and forth in place. | D. | move only when the rock in
shaken. |
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7.
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A substance that contains only one type of atom is a(n)
A. | compound. | B. | element. | C. | heterogeneous
mixture. | D. | homogeneous mixture. |
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8.
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Melted candle wax has no fixed shape, but it does have a fixed volume. Thus,
melted candle wax is a
A. | solid. | B. | pure substance. | C. | liquid. | D. | gas. |
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Using the diagrams below
to answer questions 9-12.
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9.
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Which of the containers above most-likely contain matter in the solid
state?
A. | container A & container B | B. | container B & container
C | C. | container A & container C | D. | only container
C |
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10.
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Which containers above have a pure substance?
A. | container A & container B | B. | container B & container
C | C. | container A & container C | D. | only container
C |
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11.
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Which of the containers above have molecules?
A. | container A & container B | B. | container B & container
C | C. | container A & container C | D. | only container
C |
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12.
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Water molecules are made of one oxygen atom and two hydrogen atoms. Which
container has water molecules in them?
A. | container A | B. | container B | C. | container
C | D. | containers A & B |
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13.
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21.0 g of pure silver have a volume of 2.00 cm3. What is the density
of silver?
A. | 10.5 g/cm3 | B. | 42 g/cm3 | C. | 0.1
g/cm3 | D. | 23 g/cm3 |
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14.
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Which of these is a physical change, not a chemical change?
A. | A wax candle burns. | B. | An old can rusts. | C. | A scrambled egg
cooks. | D. | An aluminum can melts. |
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15.
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Which of these is a chemical property, not a physical property?
A. | mass | B. | color | C. | ability to
burn | D. | ability to be shaped |
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16.
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Which of these is a chemical change, not a physical change?
A. | a ball of clay rolled out flat | B. | a loaf of bread baked in the
oven | C. | a piece of paper torn to shreds | D. | a bowl of ice cream melted into
liquid |
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17.
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Which of the following is an example of freezing?
A. | melted wax becomes solid | B. | ice becomes liquid water | C. | ice becomes water
vapor | D. | water vapor becomes water droplets |
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18.
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The temperature at which a solid becomes a liquid is called
A. | sublimation. | B. | melting point. | C. | condensation. | D. | boiling point. |
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19.
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The process of a solid changing directly to a gas is called
A. | evaporation. | B. | freezing. | C. | sublimation. | D. | condensation. |
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20.
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Which of the following is an example of boiling?
A. | A puddle of water dries up slowly in sunlight. | B. | Gas in a soft drink
escapes as bubbles float upward. | C. | Heated water forms bubbles of water vapor
inside it. | D. | Water in a freezer becomes an ice cube. |
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21.
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David has a mass of 82 kilograms. What would his mass be on the
moon?
A. | 82 kilograms | B. | 131 kilograms | C. | 804
Newtons | D. | Not enough information |
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22.
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Iron is attracted to a magnet while tin is not. If a mixture of iron and tin
pieces is placed near a magnet,
A. | the iron and tin will dissolve. | B. | the iron will separate from the
tin. | C. | the tin will become more dense than the iron. | D. | the iron will become
more dense than the tin. |
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23.
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The amount of space an object occupies is called its
A. | volume. | C. | weight. | B. | mass. | D. | length. |
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Use the chart below to
answer the questions
24-26.
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24.
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Which of the substances above is the most dense?
A. | substance A | C. | substance C | B. | substance B | D. | They are all the same
density |
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25.
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Which of the substances above could possibly have the same identity?
A. | substance A & substance B | B. | substance B & substance
C | C. | substance A & substance C | D. | None can have the same
identity. |
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26.
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The density of a 500.0 gram sample of substance B should be
A. | 100.0 grams per cubic centimeter. | B. | 0.06 gram per cubic
centimeter. | C. | 6.0 grams per cubic centimeter. | D. | Not enough
information. |
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27.
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Which of the following would be considered a homogeneous mixture?
A. | salt water | B. | chicken noodle soup | C. | oil and
water | D. | sand |
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28.
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Dew collects on the blades of grass in the early morning. This is an
example of
A. | evaporation. | B. | melting. | C. | sublimation. | D. | condensation. |
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