question

Soil is a mixture of weathered rock, mineral fragments, water, air and ____. a. sand c. moss b. decayed organic matter d. clay

answer

b

question

The layer of soil that contains the most organic material is called the ____ horizon. a. A c. C b. B d. D

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a

question

All of the following cause mechanical weathering EXCEPT a. ice c. burrowing animals b. tree roots d. carbonic acid

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d

question

Litter often covers the ____ horizon. a. A c. C b. B d. all of the above

answer

a

question

Chemical weathering is more rapid in a ____ climate. a. warm, dry c. cold, dry b. warm, wet d. cold, wet

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b

question

Mechanical weathering is more rapid in a ____ climate. a. dry c. cold b. hot d. humid

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c

question

The organic matter in humus is made of ____. a. dead worms c. roots b. stems d. all of the above

answer

d

question

The rate of weathering depends upon the area's ____. a. oxygen c. water b. climate d. soil

answer

b

question

The rock and mineral fragments in soil come from rock that has been ____. a. blasted b. carved c. weathered d. chemically treated

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c

question

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

answer

c

question

Soils in ____ contain little organic material and are thin a. tropical areas c. prairies b. deserts d. temperate forests

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b

question

Plants cannot grow without ____. a. rocks c. moss b. soil d. pesticides

answer

b

question

The mass of clay, silt, sand, and boulders that covers much of the United States was deposited by ____. a. farming c. ice wedging b. glaciers d. huge bulldozers

answer

b

question

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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b

question

Oxidation occurs when materials containing ____ are exposed to oxygen and water. a. iron c. kaolinite b. carbonic acid d. all of the above

answer

a

question

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

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c

question

Plants don't grow as well when ____ has been lost. a. clay c. parent rock b. topsoil d. slope

answer

b

question

____ is a factor that affects soil development. a. Time c. Type of rock b. Slope d. all of the above

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d

question

The ____ horizon has smaller rock and mineral particles than the other layers. a. A c. C b. B d. D

answer

a

question

Below the C horizon is ____. a. topsoil c. clay b. rock d. humus

answer

b

question

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

answer

a

question

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

answer

c

question

In areas where freezing and thawing occur frequently, rocks weather rapidly because of the ____ of freezing water. a. evaporation c. leaching b. expansion d. oxidation

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b

question

Because desert soils contain little organic material, their soil profiles have ____ horizons. a. thick c. thin b. no d. b or c

answer

c

question

Soil erosion occurs ____. a. where animals eat away all the plants b. when forests are removed c. on steep slopes d. all of the above

answer

d

question

The ____ in rocks are the spaces between the grains and crystals, and also are the cracks in rocks. a. deposits c. pores b. saturation zones d. sediments

answer

c

question

____ rock contains well-connected pores and allows groundwater to flow through it. a. Nonporous c. Impermeable b. Low-porosity d. Permeable

answer

d

question

The ____ is the zone where pores are full of water. a. zone of aeration c. zone of saturation b. zone of fractures d. water table

answer

c

question

A well that is drilled into a pressurized aquifer is called a ___ a. sandwiched aquifer c. artesian well b. spring d. geyser

answer

c

question

Geologic time is divided into units based upon types of a. sedimentary rocks c. organisms b. climatic changes d. igneous rocks

answer

c

question

The longest subdivision in geologic time is a(n) ____. a. epoch c. century b. period d. eon

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d

question

____ existed during the Mesozoic Era. a. Angiosperms c. Birds b. Humans d. both a and c

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d

question

Cenozoic Era life-forms include ____. a. humans c. marine mammals b. reptiles d. all of the above

answer

d

question

Homo sapiens probably appeared ____ ago. a. 66 million years c. 400,000 years b. 6 million years d. none of the above

answer

c

question

The end of the Paleozoic Era was signaled by ____. a. the development of humans b. mass extinction of land and sea animals c. the development of organisms with hard parts d. both a and b

answer

b

question

Animal life in the Paleozoic Era included all of the following EXCEPT ____. a. marine life c. amphibians b. humans d. reptiles

answer

b

question

The division of Earth's history into smaller units makes up the ____. a. eras c. periods b. geologic time scale d. sequence of events

answer

b

question

A stream can erode no deeper than its ____ level. a. angular c. core b. base d. point

answer

b

question

____ streams have channels with many curves. a. Meandering c. Drainage b. Braided d. Canyon

answer

a

question

Streams with bars, islands, and divided channels are called ____ streams. a. meandering c. drainage b. braided d. canyon

answer

b

question

The entire land area drained by a stream is called the drainage ____. a. point c. basin b. bar d. fan

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c

question

A ____ separates a drainage basin of one stream from the drainage basin of another. a. point c. erosion b. bar d. divide

answer

d

question

A ____ is formed by sediment deposited where a stream empties into a gulf or a bay. a. fan c. braid b. delta d. floodplain

answer

b

question

true or false: Radiocarbon dating would be useful in dating the age of Earth.

answer

f

question

true or false: Absolute age examines the position of rocks in a sequence.

answer

f

question

t/f : Groundwater is found in pores of soil and rock.

answer

t

question

t/f: A low volume of pores means the rock has low porosity.

answer

t

question

t/f: As the human population continues to increase, less groundwater will be used.

answer

f

question

t/f: The greater the slope of the water table, the faster the groundwater flows.

answer

t

question

t/F: Streams with high suspended load appear clear.

answer

f

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