Author Question: The continental crust has an average age of and a maximum age of . A) 1.2 ... (Read 5 times)

corkyiscool3328 · **on:** Jul 16, 2018

The continental crust has an average age of ________ and a maximum age of ________.

A) 1.2 billion; 3.9 billion
B) 1.6 billion; 4.0 billion
C) 1.8 billion; 3.2 billion
D) 2.2 billion; 4.4 billion

Question 2

Using Figure 9.9 in your textbook, choose the option that sequences the elements according to what scientists think are the least abundant elements in the mantle to the most abundant elements in the mantle.

A) Pd, Au, Ge, Mn
B) V, P, Mo, Ru
C) Cr, Fe, Ag, Os
D) As, Pt, W, Ga