Unit 36 Review Questions

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. What property of water is most important to its function as an agent of mechanical weathering?

The large amount of heat it takes to melt water correct incorrect

The large amount of heat it takes to evaporate water correct incorrect

The fact that water expands when it freezes correct incorrect

The ability of water to cause erosion correct incorrect

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. Salt wedging:

is not dependent on water correct incorrect

occurs when salt crystals form and grow correct incorrect

is a key type of chemical weathering correct incorrect

rarely occurs away from coastal areas correct incorrect

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. When you see rounded granitic boulders far from streams in the mountains, they most likely assumed this shape through:

spheroidal weathering correct incorrect

root wedging correct incorrect

salt wedging correct incorrect

exfoliation correct incorrect

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. On average, chemical weathering is most rapid in:

deserts correct incorrect

tropical regions correct incorrect

midlatitude grasslands correct incorrect

northern forests correct incorrect

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. Of the following, which is typically the most acidic?

A raindrop leaving a cloud correct incorrect

A raindrop right before it impacts the ground correct incorrect

A raindrop right when it impacts the ground correct incorrect

Water from the raindrop after it spends a week percolating through soil correct incorrect

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. Which of the following is a common precursor of clay minerals?

Limestone correct incorrect

Iron sulfide correct incorrect

Silicate minerals correct incorrect

Quartz correct incorrect

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. Which of the following biological weathering processes is essentially physical?

Tree roots growing into rock fractures correct incorrect

Animals digging burrows in the soil correct incorrect

Plant roots releasing compounds into the soil correct incorrect

Lichens growing on bare rock correct incorrect