Layers of the Earth. ► ► Atmosphere ► ► Crust (continental and oceanic) ► ► Mantle ► ► Outer core ► ► Inner core.

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Presentation transcript:

Layers of the Earth

► ► Atmosphere ► ► Crust (continental and oceanic) ► ► Mantle ► ► Outer core ► ► Inner core

► ► Atmosphere g/ml ► ► Crust (continental and oceanic) 2.7 g/ml and 3.3 g/ml ► ► Mantle3.3 g/ml ► ► Outer core10 to 12.3 g/ml ► ► Inner core12.8 to 13.1 g/ml These layers form according to density! Layers of the Earth

How much water is on the earth?

How big is the atmosphere?

Side by Side

Atmosphere Atmosphere – right next to space! Gas 100 km thick 78% nitrogen, 21% oxygen, 1% other (carbon dioxide, etc.)

Crust – the ground we stand on Solid 7 km to 70 km thick Continental: granite Oceanic: basalt

Mantle Mantle – the largest layer of the earth Semi-solid (plastic) 2900 km thick iron, magnesium, calcium, rock

Outer Core Outer Core – melted metal! Liquid 2200 km thick iron, nickel, sulfur

Inner Core Inner Core – HOT metal squished to a solid! Solid 1200 km thick iron, nickel

-50 to 900 degrees C

► ► What is the best estimate of the densities of the various layers of the Earth? ► ► Estimates vary, but some approximate values should be as follows (in grams per cubic centimeter):  Continental Crust: 2.7 to 3.0  Oceanic Crust: 3.0 to 3.3  Mantle (silicates): 3.3 to 5.7 (increasing with depth?)  Outer Core (liquid): 9.9 to 12.2  Inner Core (solid): 12.6 to 13.0 ► Taken from on 4/23/14

Lithosphere - crust & top section of the mantle, broken into plates, solid Asthenosphere - middle section of the mantle, plastic layer (semi-solid)

The Crust is Broken into Sections

Convection Currents

Convection Currents occur in the mantle

Metal can float in metal

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