Protective structures used to control mass-wasting include all of the following except
A. tunnels.
B. terraces.
C. retaining walls.
D. a covering comprised of a heavy chain mesh.
Answer: B
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A 1-kg chunk of slime moving at 1 m/s collides and sticks to a 5-kg bowling ball initially at rest. The momentum of the combined ball and slime is
A. 0 kg?m/s. B. 5 kg?m/s. C. 1 kg?m/s. D. 2 kg?m/s.
Give three examples of limiting factors for populations of organisms in aquatic systems.
What will be an ideal response?
Which of the following does not belong?
A) Hadley Cell B) Tropical rain forest biome C) Oxisol D) Stable atmosphere
?Match the term with the correct description.
A. ?natural nutrient enrichment of a shallow lake, a coastal area at the mouth of a river, or a slow-moving stream B. ?human activities that increase the input of plant nutrients to a lake C. ?loss of oxygen in a section of a stream due to the breakdown of biodegradable wastes by bacteria D. ?massive volume of ocean water with a low dissolved oxygen content E. ?a lake low in nutrients with clear water