Explain how one could differentiate a soil that had developed under a grassland cover from one that had developed under a forest cover
What will be an ideal response?
Answer: Grassland: humus-rich A horizon with plentiful cations. They have thick, dark A horizons, weak B horizons, and a C horizon present. Forest: Main source of organic material from leaf decay, thinner A horizon, acidic soils, reddish clay-rich B horizons.
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What type of stress could form the fault in this figure?
A) Confining pressure
B) Vertical tension
C) Shear
D) None of these are correct.
Compressions and rarefactions normally travel in
A) the same direction in a wave. B) opposite directions in a wave.
What is true about loess and river valleys?
A) Loess deposits tend to be thinner and sandier close to river valleys. B) Loess deposits tend to be thinner and less sandy close to river valleys. C) Loess deposits tend to be thicker and sandier close to river valleys. D) Loess deposits tend to be thicker and less sandy close to river valleys.
Which of the following holds the highest levels of oxygen?
A) Warm water near the surface of a marsh in Everglades National Park in May B) Warm water in a mud puddle along a dirt road in Nebraska in June C) Cold flowing water in a stream in Ontario in April D) Water at the base of a waterfall that is formed from melting snow in mountains of Oregon in July