What is geothermal energy?

Geothermal energy is thermal energy generated and stored in the Earth.To know more,
http://en.wikipedia.org/wiki/Geothermal_energy

This word derived from Greek, Geothermal energy is the heat from the Earth..

All of us know that earth is warm and has a high temperature while we go down the earth surface. Due to High temperature of earth the heat that is released from inside the earth is used to convert in energy.This energy is called geothermal energy. This energy is used to generate electricity.