Question

I have 3 questions on seafloor spreading

Answer 1

Where is the youngest rock in the earth’s crust found?

A.
near the boundary between ocean crust and continental crust

B.
along the continental slope

C.
in the center of the continents

D.
at the center of the mid-ocean ridge

Answer 2

In addition to paleomagnetism, what other evidence was needed to determine the rate of seafloor spreading?

A.
the strength of the magnetic field

B.
the age of each strip of rock

C.
the minerals in the rocks

D.
the thickness of the rock layers

Answer 3

What causes the earth’s magnetic field?

A.
currents in the earth’s liquid-metal outer core

B.
the mineral composition of the earth’s crust

C.
molten material in the mantle

D.
magnetic particles located at the earth’s poles

Answer 4

The answers are:
D
B
A