Transcript LAYERS OF THE EARTH

LAYERS OF THE EARTH
Layers in Order
1. Crust
2. Mantle
 Lithosphere
 Asthenosphere
3. Lower Mantle
4. Outer Core
5. Inner Core
Crust
 The Earth’s crust is like the skin of an apple. It
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is very thin compared to the other three
layers.
The crust makes up 1% of the Earth.
The crust of the Earth is broken into many
pieces called plates.
5 to 25 miles thick and up to 1,600 F
Two types of crust
 Oceanic and Continental
Crust Cont.…
 Lithosphere
 Rigid outer layer of the crust
 Part of the crust/mantle
 Asthenosphere (part of the mantle)
 Solid to semi-solid rock layer
 The crust and plates glide on the asthenosphere
Mantle
 Upper Mantle
 The mantle is the largest layer of the Earth.
 Consists of crystalline formations
 Asthenosphere is located above the mantle
 1,800 miles thick and up to 8,000 F
 Lower Mantle
 Abundant in the following elements
 Silicon, Magnesium and Oxygen
Outer Core
 1,400 miles thick and up to 11,000 F
 Liquid Layer
 Spins around the Inner Core
 Causes the Earth’s Magnetic Field
 Made of…
 Liquid Iron and Nickel
 Is very dense
Inner Core
 Solid Metal
 Temperatures and pressures so great that the
metals are squeezed together and are not able to
move or melt.
 800 miles thick and up to 13,000 F
 Made of..
 Iron, Nickel and a few other metals