It has been deduced that Earth has a heavy core surrounded by_________ concentric layers of various composition and density.
A) 51
B) 3
C) 153
D) 9
E) 27
Correct Answer:
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Q69: During sedimentation, materials are often sorted by_
Q70: The concept of plate tectonics -_.
A) means
Q71: Shale, sandstone, breccia, and limestone are all
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A) gneiss
B) limestone
C)
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A) limestone
B)
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