GEOLOGY

Detailed explanation-1: -Earth’s core is the very hot, very dense center of our planet. The ball-shaped core lies beneath the cool, brittle crust and the mostly-solid mantle. The core is found about 2, 900 kilometers (1, 802 miles) below Earth’s surface, and has a radius of about 3, 485 kilometers (2, 165 miles).

Detailed explanation-2: -Geothermal energy is heat that is generated within the Earth. (Geo means “earth, ” and thermal means “heat” in Greek.) It is a renewable resource that can be harvested for human use. About 2, 900 kilometers (1, 800 miles) below the Earth’s crust, or surface, is the hottest part of our planet: the core.

Detailed explanation-3: -Sun is the star located at the center of the solar system. It is a nearly perfect sphere-shaped hot plasma. It is the major source of heat on earth as it transfers heat energy through radiation of electromagnetic waves.

Detailed explanation-4: -Through the process of conduction, heat flows from warmer objects to cooler objects (Figure below). The lower mantle is heated directly by conduction from the core. In conduction, heat is transferred as atoms collide. Hot lower mantle material rises upward.

Detailed explanation-5: -Heat inside the Earth from radioactive decay of elements and residual heat leftover from Earth’s formation.