Scientists have concluded that the uppermost part of the mantle is partially-molten. Which observation helped them reach this conclusion?
Both P and S waves slow down when they reach this layer.
Both P and S waves speed up when they reach this layer.
P waves do not travel through this layer.
S waves do not travel through this layer.
Answers: 1
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Scientists have concluded that the uppermost part of the mantle is partially-molten. Which observati...
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