Layers of the Earth

By Lachlan Thomas

The Crust

• The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers.

• The crust is 3-80 km thick. • The temperatures of the crust vary

from air temperature on top to about 1600 degrees Fahrenheit (870 degrees Celsius) in the deepest parts of the crust.

The Mantle

• The Mantle is the thickest part of the earth’s surface at 3000 km thick.

• The movement of the mantle is the reason that the plates of the Earth move.

• The temperature of the mantle is from 1600 degrees to 4000.

Outer Core

• The core of the earth is very hot it can reach from 4000 degrees F to 9000.

• The (outer core) is so hot that the metals in it are in a liquid state.

• The Outer Core is about 2258 km thick.

• The outer core is composed of melted iron and nickel.

Inner Core

• The Inner core has pressure and temperature so great that the metals are squeezed together and are not able to move like a liquid, they are forced to vibrate in place.

• Temperature may reach 9000 degrees F and the pressures are 45,000,000 pounds per square inch. This is 3,000,000 times as much pressure on you at sea level.

• The Inner core is 1222 km thick.

Quiz Time!

Multiple Choice:1. What is the thinnest layer of the Earth? 2. The

movement of the A. The Mantle ____is the reason that the B. The Crust

plates move. C. Inner Core A. Earth D. The skin of a apple B. Continents

C. Inner CoreD. The Mantle

3. The pressure in the inner core is ___ as much times as it is at sea level. A. 100,000,000 B. 3,000,000 C. 9,000 D. 400,000,000,000

Answer Time!

1. B2. D3. B

Sources

Mehttp://volcano.oregonstate.edu/education/vwlessons/lessons/Earths_layers/Earths_layers4.html