Why is Earth's interior important?

• The configuration of the surface of the earth is largely a product of the processes operating in the interior of the earth. 
• Exogenic as well as endogenic processes are constantly shaping the landscape. 
• A proper understanding of the physiographic character of a region remains incomplete if the effects of endogenic processes are ignored. 
• Human life is largely influenced by the physiography of the region. Therefore, it is necessary that one gets acquainted with the forces that influence landscape development. 
• To understand why the earth shakes or how a tsunami wave is generated, it is necessary that we know certain details of the interior of the earth.

Further Reading:

• Inside Our Earth
• Geography Notes