Earths Structure

1
Earths Structure

• The composition of the Earth

2
Structure

• There are three basic parts to the Earths
  structure
• They include
• Crust
• Mantle
• Core

3
Crust

• The crust is the outermost layer of the Earth
• It is approximately 8km deep
• There are two types of crust
• Continental crust is the land that we live on
• Oceanic crust is what exists at the bottom of the
  ocean
• Continental crust is less dense than oceanic
  crust, this is why dry land exists

4
Mantle

• The mantle is the layer directly below the crust
• It is made of iron and other minerals
• It is broken up into the upper and lower mantle
• Convection currents occur in this layer which are
  the cause of the movement of the crust
• The mantle is also one of the two parts that is
  responsible for the Earths magnetic field

5
Core

• This is the innermost part of the Earth
• It also consists of Iron and other elements
• The core is the hottest and most dense portion of
  the Earth
• It is also partially responsible for the Earths
  magnetic field
• It creates the hot spots in the mantle that drive
  the convection currents