2. • 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.
3. • 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.
4. • 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.
5. • 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.
6. 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 Core
D. 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
