Geography

18 June, 12:02

Approximately how old is the Earth thought to be?

(A) 4.6 million years

(B) 4.6 hundred years

(C) 4.6 billion years

(D) 4.6 thousand years 2. Our knowledge of the Earth's deep interior (below the crust) is mostly derived from: (A) direct sampling of the interior using very deep test well drilling

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