Hunter on April 21, 2019
Why is A right?
I thought A was general for many reasons, and I don't see support for it in the passage.
First, the ages of other rocks aren't even mentioned in the passage. So, even if could say the oldest submarine basalt rock, how could I make that jump to the rest of the rocks in the ocean?
And how would I know that the rock closest to the continents are those furthest from the global mid-ocean ridge? I don't even have information of where mid-ocean ridge is located in the text. I mean am I supposed to assume that mid means middle of continents?
I think there is more support for C. If I know magnetite locally distorts compasses on land, and magnetite is contained in the rock making up much of the ocean floor, than I have some reason to believe compass reading are more likely to be distorted at sea.
Ravi on May 2, 2019
Hunter on May 2, 2019
on August 10, 2020