Convergent Boundary: This is were plates crash or crunch together. Here mountains, earthquakes and volcanoes occur.
Divergent Boundary: This is were plates are coming apart. When they separate, they create a valley called rift. Earthquakes occur along the faults, also volcanoes form where the magma reaches the surface.
Transform Boundary: This is were plates just slide past each other. The sliding action often cause a lot of earthquakes like for example the San Andreas Fault hit San Fransisco.
Convection Currents: They are caused by very hot materials at the deepest part of the mantle rising, then cooling and sinking. Then heating, rising and repeating the cycle over and over again.
Oceanic Crust: This is part of the crust that is found under the ocean.
Continental Crust: It is the outermost layer of earth and it's made up of igneous, sedimentary, and metamorphic rocks.