Tectonic Plates

By: Jaden Thomas

Three Main Layers of Earth

Earth is made up of the Crust, Mantle, and the Core.

Core: Where we live and thrive and where the Earth holds its natural resources, made up of continental and oceanic crusts

Mantle: The area between the crust and core which makes up two-thirds of the Earth's mass. The mantle goes through a process know as convection.

Core: Helps contain the Earth's magnetic field.

Continental Drift

The idea of the continents were once together and moved apart through out the years- first proposed by Alfred Wegener. He proved his theory by showing some of the continents fit perfectly together and that one of the same fossils were found on the east and west coast of he world

Features of the Plates

Sea-floor spreading: First discovered by Harry Hess, sea-floor spreading is the formation of new areas on the an oceanic crust through the upwelling of magma at ocean ridges with outward movement on either side.

Convection and Plate Movement: Plates move because of the very high temperatures the core warm materials rise and cold materials sink and it is a constant process happening over and over again.

Theory of Plate Tectonics: The Lithosphere divided into plates which travel by themselves over the mantle.

Transform Boundary: is when plates slide past each other causing faults like the San Andreas fault.

Divergent Boundary: when plates slide away from each other causing rift valleys like the African Rift Valley.

Convergent Boundary: When two plates collide with each other causing folded mountains like the Himalayas

Convergent With Subduction: This is when one plate slides underneath another and forms trenches and volcanoes. The sunken plate heats up and makes what we call a ring of fire. EX: Andes Mountains

Ring of Fire: the zone where tons of volcanic activity goes on