Trenches
Mid ocean ridges
100

Trenches are long or short?

What is long

100

under water mountain systems

Mid ocean ridges

200

The movement of plates away from ridges AND TOWARDSW SUBDUCTION ZONES CREATE

what is trenches

200

pressure builds beneath ocean ridges which causes them to

what is rise up

300

trenches form by

mid ocean ridges spread and encounter subduction zones

300

what escapes through vents?

what is magma
400

the deepest trench to be measured

what is marinara trench

400

happens when the force of the rising magma pushes on the ridge

what is ridge-push

500

trench that is 6.8 miles deep 

marinara trench

500

happens when a plate is pulled by the subduction at the edge of the plate opposite the the ridge 

what is slab-pull