What is the basic difference between modern water wells and older hand dug wells?
A. modern wells can be used in deserts
B. older wells capture a greater amount of rainfall
C. older wells do not dry up
D. older wells are much larger in diameter
E. modern wells do not dry up
Answer: D
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Glaciers reshape Earth's surface because they
A. pluck rocks out of the ground, carry them away, and deposit them. B. move tectonic plates. C. contain enormous amounts of water. D. move slowly.
This country is part of Southern Africa but is separated by water ______________________.
Fill in the blank(s) with the appropriate word(s).
P and S waves do not follow simple paths as they pass through Earth; they speed up, slow down, and change direction, and S waves even disappear when they reach Earth's core.
Answer the following statement true (T) or false (F)
Ocean floor averages about ________ km depth below sea level
A) 8 B) 2 C) 4 D) 6