1. Earth’s Composition

2. Lesson 1: Layers of the Earth SC.7.E.6.1
Student will be able to describe the different layers of the earth.

3. Earth is like a peach!! Skin of the peach is the crust
Meat of the peach is the mantle
Pit of the peach is the core
Bring in some peaches

4. Layers of the EARTH INNER CORE State of Matter: Solid
Composition: Iron
Density: 13.0g/cm3
Distance below surface:
6,370km
Thickness: Thickest layer
Because of it’s density
CRUST
State of Matter: Solid
Composition: Silicon & Oxygen
Density: Less than all 3.9g/cm3
Distance below surface: Outer
surface
Thickness: Thinnest layer
MANTLE
State of Matter: Solid
Composition: Magnesium &
iron silicates
Density: 3.9g/cm3
Distance below surface: km
Thickness: Thick
OUTER CORE
State of Matter: Liquid
Composition: Iron
Density: 11.1g/cm3
Distance below surface:
5,150km
Thickness: Thick fluid like
Material.

5. Crust Brittle rocky outer layer of the Earth. Thinnest of the layers
The least dense
Made of: Silicon & Iron
Layer where we live!!!!
2 Parts
Continental Crust
Oceanic Crust

6. Mantle Thick middle layer in the solid part of the Earth
Immediately below the crust
Convection currents in the mantle cause the plates above to move
Made of magnesium
2 Parts
Upper Mantle
Lower Mantle
BONUS FACTS: 2900 km below earth’s surface (7,250 laps around 400 meter track)

7. Inside the Mantle Lithosphere Asthenosphere
The crust and part of the upper mantle = lithosphere
Less dense than the material below it so it “floats”
The plastic layer (easily flowing) inside the mantle
The lithosphere float on top of the asthenosphere =PLATE TECTONICS

8. Outer Core Inner Core Made of a thick fluid like LIQUID iron
Directly below the mantle
BONUS FACTS 5,150 km below earth’s surface (12,875 laps around a 400 meter track)
Spinning SOLID ball made of iron and nickel
Layer with the most density
BONUS FACTS 6,370 km below earth’s surface (15,925 laps around a 400 meter track)
Liquid Iron
Solid IRON