Author Question: Using Figure 12.11 in your textbook, which option correctly identifies a time that polarity changed ... (Read 68 times)

vHAUNG6011 · **on:** Jul 16, 2018

Using Figure 12.11 in your textbook, which option correctly identifies a time that polarity changed from normal to reverse and back?

A) normal to reverse: 3.04 million years ago, reverse to normal: 2.60 million years ago
B) normal to reverse: 2.60 million years ago, reverse to normal: 1.79 million years ago
C) normal to reverse: 3.33 million years ago, reverse to normal: 3.04 million years ago
D) normal to reverse: 1.79 million years ago, reverse to normal: 0.99 million years ago

Question 2

What is true of Iceland?

A) Iceland is contracting at a rate of about 4 mm per year due to melting at the Mid-Atlantic Ridge.
B) Iceland is stretching at a rate of about 4 mm per year due to expansion at the Mid-Atlantic Ridge.
C) Iceland is contracting at a rate of about 4 m per year due to melting at the Mid-Atlantic Ridge.
D) Iceland is stretching at a rate of about 4 m per year due to expansion at the Mid-Atlantic Ridge.