1. 6.2 Notes The Theory of Plate Tectonics

2. 6.2 Notes
Plate Tectonics– the theory that the Earth’s lithosphere is divided into plates that move around on the asthenosphere
Tectonic Plates – pieces of the crust or lithosphere that float on the asthenosphere

3. 6.2 Notes
Convection current – hot liquid rises while cool liquid sinks creating a circular current
Convection currents in the mantle/asthenosphere cause the plates to move
Caused by a difference in temperature from the core
Convection currents can happen in either liquid or gas
Subduction zone – oceanic crust sinks under continental crust at a convergent boundary creating a trench
Trench – a deep dark hole

4. Convection Currents cause the plates to move

5. Many times volcanoes are created at subduction zones (convergent boundaries or reverse faults)