Earth structure
The very center of the earth.
Inner core
Many of earth's features are formed by the motion of this.
Plates
The thickest layer on earth.
Mantle
Plates move about this much each year.
1/4 inches to four inches.
Made up of many kinds of rock, such as granite, sandstone, and marble.
Crust
They can move toward, away or past each other.
Plates
This part of earth is about 20 miles thick in most places, but it can be as little as 5 miles thick.
Crust
When two plates pass each other.
Fault
This layer of earth is hot liquid metal.
Outer core
About this many make up the earths crust.
20