Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Soil is a mixture of weathered rock, mineral
fragments, water, air and ____.
a. | sand | c. | moss | b. | decayed organic
matter | d. | clay |
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2.
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The layer of soil that contains the most organic
material is called the ____ horizon.
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3.
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Which of these does NOT cause mechanical
weathering?
a. | ice | c. | burrowing animals | b. | tree
roots | d. | carbonic acid |
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4.
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Litter often covers the ____ horizon.
a. | A | c. | C | b. | B | d. | all of the above |
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5.
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Chemical weathering, such as rusting, happens
faster in what kind of climate?
a. | warm, dry | c. | cold,
dry | b. | warm, wet | d. | cold,
wet |
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6.
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The organic matter in humus is made of
____.
a. | dead worms | c. | roots | b. | stems | d. | all of the above |
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7.
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The rock and mineral fragments in soil come from
rock that has been ____.
a. | blasted | c. | weathered | b. | carved | d. | chemically
treated |
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8.
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On steep slopes and mountains, ____ helps reduce
erosion by creating level areas for crops.
a. | a shelter belt | c. | mulching | b. | strip
cropping | d. | terracing |
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9.
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Ice wedging is caused by ____.
a. | carbonic acid freezing on rocks | c. | water freezing and thawing | b. | water and oxygen reacting | d. | rocks colliding
with each other |
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10.
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Minerals found in the B horizon were dissolved in
water and carried there by a process called ____.
a. | oxidation | c. | weathering | b. | leaching | d. | littering |
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11.
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The B horizon is ____.
a. | rockier than the C horizon | c. | lighter in color than the A horizon | b. | richer in humus than the A horizon | d. | thinner than the C
horizon |
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12.
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Mechanical weathering ____.
a. | breaks apart rocks by physical
processes | b. | occurs when chemical reactions dissolve or change the
minerals in rocks | c. | occurs when iron
is exposed to oxygen and water | d. | none of the
above |
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13.
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Chemical weathering ____.
a. | is caused by freezing and
thawing | b. | breaks apart rocks by physical
processes | c. | occurs when chemical reactions dissolve or change the
minerals in rocks | d. | none of
above |
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14.
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In areas where freezing and thawing occur
frequently, rocks weather rapidly because of
a. | evaporation | c. | carbonic acid | b. | ice
wedging | d. | soil leaching |
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15.
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When water mixes with carbon dioxide gas in the air
or soil, ____ forms.
a. | carbonic acid | c. | calcite | b. | lactic
acid | d. | oxygen |
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16.
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Most farmers in Georgia use this method for
farming, but it can cause soil erosion.
a. | Grazing | c. | Conventional Plowing | b. | No-tilling
farming | d. | Terracing |
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17.
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Soil erosion occurs ____.
a. | where animals eat away all the
plants | c. | on steep slopes | b. | when forests are removed | d. | all of the
above |
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18.
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When farmers leave plant stalks in the field to
reduce soil erosion, it is called ____.
a. | contour farming | c. | no-till farming | b. | plowing | d. | terracing |
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19.
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Surface
processes that work to break down rock into sediment are called__________.
a. | erosion | c. | ice
wedging | b. | weathering | d. | oxidation |
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20.
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Why is ice wedging most obvious in the
mountains?
a. | because the altitude directly contributes to how the
water freezes in the cracks of rocks | c. | because the pressure in the mountains allows for the repeated freezing and
thawing of water caught in cracks of rocks | b. | because gravity
pulls on the water in the cracks more if its found higher in the mountains | d. | because the
temperature changes in the mountains allow for the repeated freezing and thawing of water caught in
cracks of rocks |
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21.
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Erosion is more common on
a. | steep slopes and mountain sides | c. | in valleys | b. | level
ground | d. | on gently sloping hills |
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22.
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How does soil erosion damage topsoil?
a. | it makes it more fertile | c. | it washes it away | b. | it keeps it
moist | d. | it moves the topsoil to other areas where it is more
needed |
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23.
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What type of farming uses steps built into the
sides of steep hillsides?
a. | contour plowing | c. | no
till farming | b. | terraces | d. | conventtional
plowing |
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24.
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In this type of farming, farmers plant new crops on
top of the old crops without plowing.
a. | terraces | c. | conventional plowing | b. | irrigation | d. | no till farming |
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25.
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This is the process where rocks are physically
broken into sediment that is identical to the parent rock, the pieces are just smaller.
a. | chemical weathering | c. | mechanical weathering | b. | soil
erosion | d. | soil horizons |
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