Structure Of The Earth

Question 1

What is the inner core?

Answer 1

The inner core is 2900 km below the Earth’s surface, in the centre of the Earth, and is the hottest layer. It is spherical and solid and made up of iron and nickel. Its temperatures can reach 5500°C.

Question 2

What is the outer core?

Answer 2

The outer core is the layer surrounding the inner core. It is made of liquid iron.

Question 3

What is the mantle?

Answer 3

The mantle is the layer of the Earth which makes up 84% of its volume. It is also the thickest section at approximately 2900 km thick. The mantle is made up of different layers. The upper mantle is hard but below that is semi-molten rock called magma.

Question 4

What is the crust?

Answer 4

The crust is the outer layer of the Earth on which we live. It is the thinnest layer and is between 5 and 90 km thick.

Question 5

What are the four layers the earth is made up of?

Answer 5

Crust
Mantle
Inner core
Outer core