Multiple Choice
Identify the choice that best completes the
statement or answers the question.
|
|
|
1.
|
Soil is a mixture of weathered rock, mineral fragments, water, air and
____.
a. | sand | c. | moss | b. | decayed organic matter | d. | clay |
|
|
|
2.
|
The layer of soil that contains the most organic material is called the ____
horizon.
|
|
|
3.
|
Litter often covers the ____ horizon.
a. | A | c. | C | b. | B | d. | all of the
above |
|
|
|
4.
|
Mechanical weathering is more rapid in a ____ climate.
|
|
|
5.
|
The organic matter in humus is made of ____.
a. | dead worms | c. | roots | b. | stems | d. | all of the
above |
|
|
|
6.
|
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 |
|
|
|
7.
|
The difference between mechanical and chemical weathering is ____.
a. | the length of time each takes to break up a rock | b. | that only chemical
weathering involves water | c. | the way they affect the makeup of a
rock | d. | all of the above |
|
|
|
8.
|
Plants cannot grow without ____.
a. | rocks | c. | moss | b. | soil | d. | pesticides |
|
|
|
9.
|
Ice wedging is brought about by ____.
a. | carbonic acid freezing on rocks | c. | water freezing and
thawing | b. | water and oxygen reacting | d. | rocks colliding with each other |
|
|
|
10.
|
Oxidation occurs when materials containing ____ are exposed to oxygen and
water.
a. | iron | c. | kaolinite | b. | carbonic acid | d. | all of the
above |
|
|
|
11.
|
The B horizon is ____.
a. | rockier than the C horizon | c. | lighter than the A
horizon | b. | richer in humus than the A horizon | d. | thinner than the C
horizon |
|
|
|
12.
|
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 |
|
|
|
13.
|
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 |
|
|
|
14.
|
When water mixes with carbon dioxide gas in the air or soil, ____ forms.
a. | carbonic acid | c. | calcite | b. | lactic acid | d. | oxygen |
|
|
|
15.
|
When Joe saw the Rocky Mountains for the first time, he said, “These
mountains are much younger than the mountains in North Georgia.” How could he know
this?
a. | their sedimentary layers are still exposed | c. | they are taller so they are
actually older | b. | the Rocky Mountains have tall rugged tops from long-term
weathering | d. | the North
Georgia Mountains have rounded tops from long-term weathering |
|
|
|
16.
|
The major process that wears down whole mountain ranges is
a. | earthquakes | c. | plate movement | b. | weathering | d. | silt deposition |
|
|
|
17.
|
Which of these usually causes mechanical weathering but some also cause chemical
weathering?
a. | animals burrowing | c. | oxidation | b. | plants | d. | carbonic acid |
|
|
|
18.
|
When rocks undergo weathering, they become
a. | magma | c. | sediment | b. | igneous rocks | d. | volcanic cones |
|
|
|
19.
|
All of the following cause mechanical weathering EXCEPT ____.
a. | ice | c. | burrowing animals | b. | tree roots | d. | carbonic acid |
|
|
|
20.
|
While on a hike, Mya noticed many rocks which were round
and smooth. Which of these is the MOST LIKELY reason the rocks are round and
smooth?
a. | They were exposed to the wind. | b. | They were fractured in a landslide. | c. | They were eroded by moving water. | d. | They are volcanic rocks and were formed that
way. |
|
|
|
21.
|
Over time, a canyon in a plateau gradually became deeper.
Which of these most likely caused the canyon to become deeper?
a. | earthquakes | c. | running
water | b. | strong winds | d. | volcanic
activity |
|
|
|
22.
|
Which process is LEAST LIKELY to cause
erosion?
a. | ocean waves | b. | wind blowing | c. | glacier
movement | d. | continental plate
movement |
|
|
|
23.
|
The action of the wind creates sand dunes in deserts
and beaches. Which process is responsible for the formation of sand dunes?
a. | deposition | c. | erosion | b. | etching | d. | weathering |
|
|
|
24.
|
Which of these supplies beaches with the most new
sand?
a. | Rivers | c. | Tides | b. | Marine
organisms | d. | Rain |
|
|
|
25.
|
Which of these moves the most sand along the
coast?
a. | Humans | c. | Waves | b. | Marine
organisms | d. | Wind |
|