Why does earthquake shaking of water-saturated sand often lead to ground settling?
A) The shaking of sand leads to closer packing of the grains.
B) The shaking wears off the edges of the grains making them smaller.
C) The shaking makes the grains settle in the water.
D) It doesn't. Settling only occurs if you pump water out of the ground.
E) Shaking rearranges the atoms in the grains, allowing them to fit closer together.
Correct Answer:
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