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Weathering
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What type of weathering is illustrated by the cracks in the simulated granite outcrop below?
WeatheringAQ1
Frost wedging.
Abrasion.
Pressure release.
Salt weathering.
The rock below is in Whistler, Canada. What type of weathering is illustrated here?
WeatheringAQ2
Frost wedging.
Abrasion.
Pressure release.
Salt weathering.
Which types of mechanical weathering are most likely represented below?
WeatheringAQ3
A) Salt weathering, B) root wedging, C) pressure release, D) lichen growth
A) Heat expansion, B) lichen growth, C) salt weathering, D) abrasion
A) Abrasion, B) root wedging, C) heat expansion, D) salt weathering
A) Frost wedging, B) root wedging, C) salt weathering, D) heat expansion
Based on the weathering patterns you see, what rock type is most likely shown below?
WeatheringAQ4
Granite.
Sandstone.
Limestone.
Shale.
Which climate conditions will cause the fastest chemical weathering of granite, sandstone, and shale?
Warm and dry.
Warm and wet.
Cold and dry.
Cold and wet.
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All Answers 1
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Here are the answers with brief explanations:
1. Pressure release. — Granite outcrops commonly fracture and exfoliate as overlying pressure is removed, producing the sheet-like cracks shown.
2. Frost wedging. — Whistler’s cold, wet climate promotes freeze–thaw cycles that force cracks open.
3. A) Abrasion, B) root wedging, C) heat expansion, D) salt weathering. — These are standard mechanical-weathering types matching the four pictured processes.
4. Granite. — The blocky, jointed/exfoliation weathering pattern is typical of granite.
5. Warm and wet. — Chemical weathering rates are highest where temperatures and moisture are both high.
1. Pressure release. — Granite outcrops commonly fracture and exfoliate as overlying pressure is removed, producing the sheet-like cracks shown.
2. Frost wedging. — Whistler’s cold, wet climate promotes freeze–thaw cycles that force cracks open.
3. A) Abrasion, B) root wedging, C) heat expansion, D) salt weathering. — These are standard mechanical-weathering types matching the four pictured processes.
4. Granite. — The blocky, jointed/exfoliation weathering pattern is typical of granite.
5. Warm and wet. — Chemical weathering rates are highest where temperatures and moisture are both high.
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