• The structure of planet Earth consists of a crust, a mantle and a core.
• The planet's crust is comprised of lithospheric or tectonic plates.
• The planet's mantle consists of molten rock, which can sometimes erupt to the planet's surface. 
• The movement of tectonic plates results in endogenous processes.
• Tectonic plates move in different directions relative to each other. This movement results in earthquakes, tsunamis and volcanic activity.