The Earth's core is the primary source of geothermal energy due to the decay of radioactive elements and the gravitational compression of the Earth's mass.

Fossil fuels, such as coal, oil, and natural gas, are not geothermal energy sources because they are derived from organic matter, not from the Earth's internal heat.

Heat is transferred from the Earth's interior to the surface through conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between two objects, convection is the transfer of heat through the movement of fluids, and radiation is the transfer of heat through electromagnetic waves.

Hydropower plants do not extract geothermal energy. They generate electricity from the energy of flowing water.

The main environmental concern associated with geothermal energy production is air pollution, particularly the release of hydrogen sulfide gas, which can have adverse effects on human health and the environment.

Iceland is the world leader in geothermal energy production, with over 90% of its electricity generated from geothermal sources.

The typical temperature range of geothermal reservoirs is 150-250 °C, although some reservoirs can reach temperatures as high as 450 °C.

High cost of exploration and drilling is a disadvantage of geothermal energy, not a benefit.

Heat flux is the term used to describe the amount of heat flowing from the Earth's interior to the surface.

Combined cycle power plants are not geothermal power plants. They use a combination of gas and steam turbines to generate electricity.

Geothermal energy can be used for electricity generation, heating and cooling buildings, and industrial processes.

Atmospheric pressure does not affect the amount of heat flow from the Earth's interior.

Geothermal power generation is the process of converting geothermal energy into electricity.

Magma is not a type of geothermal reservoir because it is not a fluid.

Convection is the transfer of heat through the movement of fluids.