Layers of the Earth and Tectonic Plates
-
Thinnest Layer
Crust
-
Contains most of the Earth's mass
Mantle
-
The movement of Earth's plates
Continental Drift
-
Makes up tectonic plates
Lithospere
-
Scientist of Theory of Continental Drift
Wegener
-
Ocean floor sinks into the mantle
Subduction
-
Puzzle-like pieces floating on Asthenosphere
Tectonic Plates
-
Underwater mountain
Mid Ocean Ridge
-
Supercontinent
Pangaea
-
Trace of an ancient organism
Fossil
-
New material is added to the ocean floor
Sea Floor Spreading
-
push together; mountains
Convergent
-
divide, separating; mid-ocean ridge, rift valley
Divergent
-
grind against, slide; earthquakes, fault line
Transform
-
Deep underwater canyons
Deep Ocean Trench