Most soil erosion prevention measures
A. only allow the planting of deep-rooted crops.
B. try to slow down wind and water velocity.
C. try to compact the topsoil.
D. keep the topsoil covered at all times.
Answer: B
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Which layer in the earth is similar in composition to basalt, a dark lava rock?
a) continental crust b) oceanic crust c) upper mantle d) lower mantle e) core
Why is the velocity of valley glaciers slower along valley walls than in the center of the glacier? What will be an ideal response?
study of magnetism over geologic time
What will be an ideal response?
What is base level?
A) The highest elevation streams can be found. B) The downward limit of erosion. C) The transition from a straight channel stream to a meandering stream. D) The gradient line along the longitudinal profile of the stream.