Convergent
- plates collide together
- Continent-Continent
 - mountains form
 - marines sediments found at the peaks of mountains

- Ocean-Continent
 - mountain ranges, volcanos, and trenches

- Ocean-Ocean
 - Island arc
 - Ocean plates are colliding together and one of them is going under (more dense one)

Divergent
- diverge or move apart
- any ridge is divergent

Transform
- two plates are sliding past each other

Continental Crust
- Less dense
- made of granite
- High in silica and aluminum

Oceanic Crust
- more dense
- made of basalt
- high in iron and magnesium