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How do magnetic patterns in the rocks along the mid-oceanic ridges explain seafloor spreading?


A.


As oceanic crust sank beneath continental crust, the cooling rocks aligned with the earth's magnetic field, which periodically reversed. This periodic pattern was seen on one side of a mid-oceanic ridge.


B.


As new crust was added to the seafloor, the cooling rocks aligned with the earth's magnetic field, which periodically reversed. This periodic pattern was seen on one side of a mid-oceanic ridge.


C.


As new crust was added to the seafloor, the cooling rocks aligned with the earth's magnetic field, which periodically reversed. This periodic pattern was symmetrical on both sides of a mid-oceanic ridge.


D.


As oceanic crust sank beneath other oceanic crust, the cooling rocks aligned with the earth's magnetic field, which periodically reversed. This periodic pattern was seen on one side of a mid-oceanic ridge.

Sagot :

The answer is C. Because you see the pattern on both sides which shows that it must be spreading from the middle out as new crust rises.
jxmjxm1231

Answer: C.

As new crust was added to the seafloor, the cooling rocks aligned with the earth's magnetic field, which periodically reversed. This periodic pattern was symmetrical on both sides of a mid-oceanic ridge.

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