Layers of the Earth

• Science
• 5th Grade

The Layers of the Earth

The Layers of the Earth

How many layers do you think the earth has?

What are the layers of the Earths crust?

There are four major layers to the Earth:

• CRUST
• MANTLE
• OUTER CORE
• INNER CORE

CRUST

• The outer most layer
• Covers the earth like a shell
• The layer where we live
• The thinnest layer

MANTLE

• The layer right below the crust
• Made of rocks and ice
• The largest and thickest layer 

OUTER CORE

• Made of liquid iron and nickel
• Creates magnetic field of the entire planet

INNER CORE

• The inner most layer
• Solid, made mostly of nickel and iron
• Temperatures as high as 5200^oC
• Helps to create magnetic field of earth

Inner Core

Crust

Mantle

Outer Core

Any Questions?

Sedimentary Rocks

ROCKS

Sedimentary rock is made up of pieces of older rocks.

It consists of separate grains in layers

Sedimentary rocks are porous – they have gaps between grains.

Because the grains are usually rounded the rocks are soft – they can easily be scratched

There are many different types of sedimentary rocks. Their appearance depends on the pieces of rock (sediments) from which they are formed.

What are igneous rocks?