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