1. CGC1D
Layers of the Earth

2. Earth’s Layers The earth is divided into four main layers Crust Mantle
Outer Core
Inner Core

3. Crust
The Crust is the part of the earth that has been exposed to the atmosphere
Once it’s exposed, it hardens and cools
This is the layer where we habitat
Exists under the oceans as well

5. Crust The Crust is similar to the skin of an apple
It is the thinnest layer of the earth
Its broken into many pieces (puzzle)
These pieces are called Tectonic Plates
Tectonic plates move by the pressure of hot magma flowing underneath

6. Tectonic Plates Tectonic plates are similar to puzzle pieces
They move based on pressure from underneath the crust
There are three types of plate boundaries:
Divergent
Convergent
Transform

8. Tectonic Plates Divergent Boundary
Tectonic plates separate from one another
They are pulled apart from magma underneath
Once they pull apart, magma rises and cools once exposed to the air

9. Tectonic Plates Convergent boundary
Plates are crashing toward ones another
This occurs due to pressure from underneath
Ex: Earthquakes and volcanoes

10. Tectonic Plates Transform boundary Plates slide against one another
Movement is not smooth
Plates can lock together and get stuck
Ex. Earthquakes

11. Mantle Layer below the crust This is the largest layer of the earth
Solid rock that flows very slowly
Magma flows underneath the crust and rises to the surface through cracks between the plates
This layers helps create pressure against the tectonic plates

13. Core Outer core: superheated liquid molten lava
Inner core: very hot that it is solid
Temperatures are so high that metals are squeezed together