Question

1. the opposite of ocean trenches are ___. they are formed at divergent plate boundaries, where the upwelling of magma from the mantle creates new ocean floor. ocean ridges ocean seamounts continental slopes abyssal plains 15. magma that creates new seafloor pushes the old crust out of the way. this is how the spreading of the sea floor occurs! true false

Explanation:

1. Ocean ridges are formed at divergent plate - boundaries by upwelling magma and are opposite to ocean trenches.
2. Sea - floor spreading occurs when new magma creates new seafloor and pushes old crust away.

Answer:

1. A. ocean ridges
2. A. True