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blazingferrai blazingferrai
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5 years ago
The movement of seismic waves through Earth's interior provides evidence of internal layering. The first boundary discovered was between the
A) upper and lower mantle.
B) inner and outer core.
C) outer core and the mantle.
D) mantle and the crust.
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Heyhey39476Heyhey39476
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5 years ago
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blazingferrai Author
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5 years ago
I'm still confused, but thanks for answering correctly
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