Question

Volcanoes form in many different tectonic settings. At a mid-ocean ridge,
A.
lava erupts and builds up between two tectonic plates that move toward each other.
B.
lava erupts and builds up between two tectonic plates that move away from each other.
C.
volcanoes form only on one side of the ridge.
D.
volcanoes are unable to build up above sea level.

Answer 1

B.

At mid-ocean ridges tectonic plates are diverging (moving away from each other). Magma rises to fill the gap, erupts as basaltic lava, and builds new oceanic crust along the ridge.