1. How much do you know about your planet?
Layers of the Earth
How much do you know about your planet?

2. True or False The Earth is made up of 3 layers.
Answer: False 4 Layers
The Crust is the thickest layer.
The Inner Core is solid.
Answer: False Mantle
Answer: True
The Mantle has liquid rock.
Answer: True (so does the Outer Core)

3. Crust The crust is the outer most layer. Where we walk and live.
The crust is up to 32 Kilometers (20 miles - here to Stone Mountain) thick.
The crust is made up of the continents and the ocean floor.
The continental crust consists of rocks such as granite, sandstone, and marble. The oceanic crust consists of basalt.
0 degrees Fahrenheit to 1590 degrees Fahrenheit
The crust’s density and temperature increase with it’s depth.

4. Lithosphere
There are two kinds of crust: continental and oceanic. Yes, there is even crust under the ocean!
The lithosphere (geosphere) is the "solid" part of Earth
It has two parts, the crust and the upper mantle.

6. Mantle The mantle is the layer under the crust.
It is up to 2,897 kilometers(1,800 miles -from here to Arizona) thick.
The mantle is made up of rocks such as silicon, aluminum, iron, and magnesium.
Top layer - hot solid rock 1590 degrees Fahrenheit
Bottom layer - hot liquid rock 3992 degrees Fahrenheit
The Mantle’s density and temperature increase with it’s depth.

7. Asthenosphere
The plastic like layer below the lithosphere is the asthenosphere
The plates of the lithosphere float on the asthenosphere
Asthenes means weak

8. Outer Core
The outer core is 2253 kilometers (1,400 miles - here to New Mexico) thick.
The temperature ranges from 2204 – 4982 degrees Celsius (4000 – 9000 degrees Fahrenheit)
Made up of the hot liquid metals iron and nickel.

9. Inner Core The very center of the earth
800 miles thick – From here to Dallas, TX
Made of the metals iron and nickel
The inner core is very hot, about 4982 degrees celsius (9000 degrees fahrenheit)
The inner core is solid. It is under so much pressure from the layers above that the metal cannot spread out and become liquid.