Geography - Plate Tectonics LC

The Inner Core

The inner core is the last layer. The inner core is made out of iron and nickel. 

Mantle

The mantle lies under the crust. The mantle is the largest layer. It is made of molten or semi-molten rock called magma 

Crust

The outer core is semi solid. It surrounds the inner core. 

Outer Core

The outer core is semi solid. It surrounds the inner core. 

SIMA

Rich in silica and magnesium 

SILA

Rich in silica and aluminium 

Pangaea

The original supercontinent that had all land joined together

Continental Drift

Continental drift states that all Earth's landmasses were once joined together as a supercontinent called Pangaea 

Asthenosphere

The layer of mantle under the lithosphere 

Moho Line

The moho line is the boundary between the upper mantle and the crust 

Seafloor Spreading

When the plates come apart underwater, lava comes out and lava cools in the seawater, and forms more crust that becomes the more seafloor 

Gutenberg Discontinuity

Where the lower mantle meets the outer core

Continental Fit

All the continents could be pieced back together like a jigsaw puzzle 

Alfred Wegener

The man who developed the theory of plate tectonics 

Harry Hess

The man who discovered that mid-ocean ridges form when plates separate due to thermal convection currents

Convection Currents

What makes the plates move

Divergent/Constructive Plate Boundary

Boundary where plates separate

Convergent/Constructive Plate Boundary

Plate boundary where plates come together

Transform Plate Boundary

Boundary where plates slide against each other