Most rock outcrops (about 75% of the total) are ________
A) igneous
B) sedimentary
C) metamorphic
D) fossil-bearing
Answer: B
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A TV set is pushed a distance of 2 m with a force of 20 N that is in the same direction as the set moves. How much work is done on the set?
A) 2 J B) 10 J C) 20 J D) 40 J E) 80 J
The horizon that is commonly called topsoil is the ________ horizon
A) A B) O C) E D) B E) C
A clay-rich soil may hold a great deal of water; however, such a soil may not necessarily be desirable in an agricultural setting because clay soils
A. are often too acidic for most crops. B. are nutrient-poor. C. are often slow to drain due to their low permeability. D. release toxic heavy metals, which are incorporated into plant tissues.
What country in the region is a cautionary tale about the limits of the ability of a valuable natural resource, such as oil, to promote development?
A) Angola B) Sudan C) Nigeria D) South Africa E) Namibia