earth’s composition lesson 1: layers of the earth sc.7.e.6.1 student will be able to describe the...
TRANSCRIPT
Earth’s Composition Earth’s Composition
Lesson 1: Layers of the Lesson 1: Layers of the EarthEarth
SC.7.E.6.1SC.7.E.6.1• Student will be able to describe the
different layers of the earth.
Earth is like a peach!!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
Layers of the EARTHLayers of the EARTH
CRUSTState of Matter: SolidComposition: Silicon & OxygenDensity: Less than all 3.9g/cm3Distance below surface: Outer surfaceThickness: Thinnest layer
MANTLEState of Matter: SolidComposition: Magnesium & iron silicatesDensity: 3.9g/cm3Distance below surface: 670-2900kmThickness: Thick
OUTER COREState of Matter: LiquidComposition: IronDensity: 11.1g/cm3Distance below surface: 5,150kmThickness: Thick fluid like Material.
INNER COREState of Matter: SolidComposition: IronDensity: 13.0g/cm3Distance below surface:6,370kmThickness: Thickest layer Because of it’s density
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
• 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 magnesium2 Parts• Upper Mantle• Lower MantleBONUS FACTS: 2900 km below
earth’s surface (7,250 laps around 400 meter track)
Mantle
Inside the MantleInside the MantleLithosphere
• 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
Asthenosphere
Liquid Iron
Liquid Iron
Outer 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)
Inner Core
Solid IRON