Weathering and Soil Answers

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Which is one factor of rock types that affects the rate of weathering?

A
porosity
B
moisture
C
temperature
D
mineral color
2
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Which describes the horizons in a soil profile?

A
Horizon A is mineral deficient.
B
Horizon O forms from organic material.
C
Horizon B undergoes the least amount of change.
D
Horizon C is most affected by the soil formation process.
3

What is one of the causes of mechanical weathering?

A
acid rain
B
oxidation
C
animal actions
D
carbon dioxide
4

Which is one factor that scientists use to classify orders of soil?

A
fertility
B
climate
C
dryness
D
bedrock
5

Which describes a climate effect on the rate of weathering?

A
Cold climates favor mechanical weathering.
B
Chemical reactions occur slower at higher temperatures.
C
Lower precipitation levels lead to more chemical reactions.
D
The chemical reaction rates of minerals are not impacted by temperature.
6

Which describes how weathering and erosion are different?

A
Weathering is caused by water.
B
Erosion is caused by wind and ice.
C
Erosion transports sediments.
D
Weathering is a natural process.
7

Organic material provides nitrogen for plants. Which soil component contributes the most nitrogen to plants?

A
clay
B
humus
C
sand
D
silt
8

Which describes the formation of Horizon B?

A
forms at the surface
B
features parent material
C
undergoes the most change
D
forms due to decomposed material
9

Which increases the rate of soil formation?

A
mixed layers
B
more precipitation
C
cooler temperatures
D
very hard parent material
10

Which soil would most likely be found in the Arctic?

A
Andisols
B
Gelisols
C
Histosols
D
Spodosols

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