Question

Which is the first step in the seafloor spreading process?
A crack forms in oceanic crust.
Volcanoes erupt under the ocean.
Molten rock rises up through the crust.
Dense plates are subducted under less dense plates.

Answer 1

steps of seafloor spreading process:
1. Magma comes out of the rift valley.
2. Magma cools to rock and hardens.
3. Rock is pushed away as new rock is formed at MOR.
4. Oceanic crust and the continental crust meet at the trench.
5. Oceanic crust bends down under the continental crust.
6. Gravity pulls rocks towards mantle.
7. Rocks melts to mantle.