Chapter 6 Test: Question Preview (ID: 22122)

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Living organisms in soil help to
a) slow the rate of soil formation
b) build up the C horizon
c) Mix the soil and make humus
d) prevent the formation of humus

What is the process that breaks down rock?
a) Weathering
b) Erosion
c) Acid rain
d) soil conservation

In which soil layer would you find loam that is rich in humus?
a) A
b) B
c) C
d) Bedrock

The grological principle stating that the same processes that that operate today also operated in the past
a) Mechanical weathering
b) chemical weathering
c) uniformitarianism
d) soil conservation

Most of the work of mixing humus within the soil is done by
a) fungi
b) ants
c) earthworms
d) bacteria

What term describes the management of soil to prevent its distruction?
a) soil exhaustion
b) soil decomposition
c) soil conservation
d) soil fertility

The most important factors in determining the rate of weathering are
a) carbon dioxide and acid rain
b) abrasion and acid from plant roots
c) animal actions and oxygen
d) rock type and climate

A hot wet climate causes weathering to take place
a) slowly
b) at the sam rate as a clool dry one
c) unevenly
d) fast

What kind of weathering causes the mineral composition of rocks to change?
a) Mechanical Weathering
b) Permeable weathering
c) chemical weathering
d) general weathering

Ice wedging causes mechanical weathering of rock by means of
a) heating and cooling
b) plant growth
c) animal actions
d) freezing and thawing of water

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