Transform (Slide), Divergent (Pull), Convergent (Push)
Transform boundaries are usually the spot where most earthquakes occur. For example the San Andreas Fault in California. Divergent boundaries sometimes make under water volcanoes just like the mid-ocean ridge. There are two types of convergent boundaries continental/continental and continental/oceanic. At cont./cont. boundaries the crust has the same density so therefore a mountain is formed. At cont./oceanic boundaries the oceanic crust is more dense so it sinks under the continental crust turns into magma (subduction zone) so therefore a volcano is formed.