Layers of the Earth.

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Presentation transcript:

Layers of the Earth

Layers of Earth Pizza Style

The Moho - boundary between Crust and Mantle The Mohorovicic Discontinuity marks the lower limit of Earth's crust. How did scientists find it?

The Mantle 2/3 of the Earth’s Mass (70% of the volume) Upper Mantle has Lithosphere (solid) and Asthenosphere pressure keeps it solid (plasticity)

The Core Extremely Dense 1/3 Earth’s Mass (30 % Volume) Outer Core: liquid, iron and nickel (magnetosphere) Inner Core: Solid, Iron

Seismic Waves Waves Created by an Earthquake or Explosion Primary (P) Waves move through liquids, solids, Gas Secondary (S) Waves move through only solids Waves bend with changes in density

The Earth’s Magnetosphere -Created from movement of the liquid, which creates a electrical current in the outer core (iron and nickel) -Dipole is created (like a magnet) -Magnetic North and Magnetic South are different from Geographic North and Geographic South

Magnetowha?

Auroras are a result of the magnetosphere.

Shadow Zones Non-uniform rigidity in material No S or P waves can get through OR P can get through but not S

Gravity Mass- the amount of matter in an object, independent of gravity. Weight- measure of the strength of the pull of gravity on an object. Law of Gravitation- states that the force of attraction between any two objects depends upon their masses and the distance between them.

Is your weight the same all over Earth Is your weight the same all over Earth? Think of the shape and your distance from Earth at different locations.

Get out your homework in your notes… You will watch the following video and explain why these people that went to Harvard are WRONG!!! Video: Your from Harvard? What the….

Seasons Video- This lady is way to into this video!!! Movements of Earth Seasons Video- This lady is way to into this video!!!