A surface layer of closely packed pebbles is called
A. deflation
B. a blowout
C. desert pavement
D. desert varnish
Answer: C
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A toy cart moves with a kinetic energy of 40 J. If it moves with twice the speed, its kinetic energy will be
A) 40 J. B) 80 J. C) 160 J. D) unknown unless we know the mass of the cart.
Soil is considered a renewable resource because it is continually being formed. Indicate whether the statement is true or false
Four of the following are goals of the Comprehensive Everglades Restoration Plan. Select the exception.
A. Restore the curving flow of the Kissimmee River. B. Build a series of massive dams to stop water from leaving the Everglades. C. Remove 400 kilometers of canals and levees south of Lake Okeechobee. D. Convert large areas of farmland to marsh. E. Create 18 large reservoirs and underground water storage areas.
Judge the following sentence according to the criteria given below: Compared to the high tide zone, more types of marine algae and soft-bodied animals can live in the middle tide zone BECAUSE seawater constantly bathes the middle tide zone
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.