Question

What causes the formation of new seafloor? A. Volcanic Activity B. Chemical decomposition C. Basaltic Magma D. Weathering

Answer 1

Answer:

A. Volcanic Activity and C. Basaltic Magma

Explanation:

Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.

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Answer 2

Answer:

C. Basaltic Magma

Explanation:

Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere. At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.

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