Energy derived from the heat inside the Earth is known as?

Energy derived from the heat inside the Earth is known as geothermal energy. This form of energy utilizes the natural heat that is found beneath the Earth's surface, which is produced by the decay of radioactive elements and the residual heat from the planet's formation.

Geothermal energy can be harnessed for various applications, particularly for generating electricity and for direct heating purposes. In geothermal power plants, steam or hot water from underground reservoirs is brought to the surface and used to drive turbines that generate electricity. Additionally, geothermal heat pumps can be used for residential heating and cooling by taking advantage of the relatively constant temperatures found a few feet below the Earth's surface.

In contrast, nuclear energy is obtained from the fission of atomic nuclei, solar energy is sourced from sunlight, and wind energy is generated from the movement of air. Each of these energy types originates from different natural processes and mechanisms, distinguishing geothermal energy as specifically associated with the Earth's internal heat.