What are the two main sources of geothermal heat?
Understand the Problem
The question is asking for the identification of the two primary sources of geothermal heat. It presents four options to choose from, requiring an understanding of geothermal energy and its origins.
Answer
Radioactive decay of minerals and heat from Earth's formation.
The two main sources of geothermal heat are the radioactive decay of minerals and the heat retained from the Earth's original formation.
Answer for screen readers
The two main sources of geothermal heat are the radioactive decay of minerals and the heat retained from the Earth's original formation.
More Information
The heat is primarily generated by the slow decay of radioactive isotopes such as uranium, thorium, and potassium within the Earth's crust and mantle.
Sources
- Geothermal — Sources - Student Energy - studentenergy.org
- Geothermal explained - U.S. Energy Information Administration (EIA) - eia.gov
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