Earth's Layers

Question 1

What is the thinnest layer of the earth?

Answer 1

Crust

Question 2

This layer can go as deep as 100km below the Earth

Answer 2

Crust

Question 3

This layer floats on top of the mantle

Answer 3

Crust

Question 4

This is the widest layer of the earth

Answer 4

Mantle

Question 5

This layer is made of magma

Answer 5

Mantle

Question 6

The upper part of this layer is harder and cooler than the lower part

Answer 6

Mantle

Question 7

Contains more iron, magnesium, and calcium than the crust

Answer 7

Mantle

Question 8

This layer is composed mostly of iron and nickel

Answer 8

The core

Question 9

How thick is the outer core

Answer 9

~2.2k km

Question 10

How thick is the mantle

Answer 10

~2.9k km

Question 11

How thick is the inner core

Answer 11

~1.3k km

Question 12

This causes the magnetic field

Answer 12

The outer core rotates within the Earth, creating an electric current.

Question 13

Why is the inner core solid despite the high temperature

Answer 13

The pressure reaches ~45million lbs/in^2, so the metals can only vibrate in place.

Question 14

Average temperatures in the mantle

Answer 14

~500 to 900 degrees Celsius

Question 15

Temperature of the outer core

Answer 15

4400 to 6000 degrees Celsius

Question 16

Temperature of the inner core

Answer 16

6000 degrees Celsius

About as hot as the surface of the sun

Question 17

Temperature of the crust

Answer 17

200 to 400 degrees Celsius