Question

question 1 (multiple choice worth 2 points)
where is new ocean floor formed?
at ocean trenches
on the continental slopes
at mid - ocean ridges
on the continental shelves

Explanation:

New ocean floor is formed at mid - ocean ridges due to the upwelling of magma. Magma rises from the mantle, cools, and solidifies to create new crust. Ocean trenches are areas of subduction, continental slopes and shelves are part of the continental margin and not sites of new ocean - floor formation.

Answer:

C. At mid - ocean ridges