Earth's Layers

The diameter of the Earth is about how many miles?

• 6,000

• 80,000

• 10,000

• 8,000

How many main layers make up the Earth?

• Two

• Three

• Four

• Five

Where is Earth's crust the thinnest?

• At the surface

• On top of mountains

• Under the ocean

• In Hawaii

The Earth's crust is broken up into pieces called ________.

Which two layers are just under the Earth's crust??

• The outer core and inner core

• The lithosphere and asthenosphere

• The continental crust and oceanic crust

• The mantle and outer core

What layer of the Earth is dark orange?

a

Crust

Mantle

Outer Core

Inner Core

Does the temperature in the Earth increase of decrease as you go deeper?

The Outer Core is made up of which two metals?

• iron and nickel

• iron and steel

• nickel and tin

• steel and tin

What percentage of the Earth's total volume does the mantle make up?

• 50%

• 68%

• 84%

• 92%

What causes the molten iron and nickel in the inner core to vibrate as solids?

• Extremely low temperatures

• High levels of radioactivity

• Immense pressure from other layers

• Rapid rotation of the Earth