What is geothermal energy?

What is geothermal energy?

• A. Heat that comes from beneath the Earth's surface, used for electricity generation or heating
• B. Energy captured from the Sun and stored underground
• C. Energy created by wind interacting with the ground
• D. Energy derived from burning seaweed to generate heat

Answer: (A)

Geothermal energy is heat stored inside the Earth’s interior that can be tapped for electricity or direct heating. This heat comes from the planet’s formation and ongoing radioactive decay, and it reaches the surface as heat flow. Engineers access it by drilling to hot rocks or underground reservoirs of steam or hot water; that steam can drive turbines to generate electricity, while the hot water itself can be used directly for heating buildings, heating greenhouses, or industrial processes. Geothermal energy provides reliable baseload power with low emissions and a small land footprint, but it depends on having suitable geological conditions and is more location-specific. The other descriptions don’t fit because geothermal energy is not sourced from the Sun, wind interacting with the ground, or burning seaweed; it comes from the Earth’s internal heat.

Geothermal energy is heat stored inside the Earth’s interior that can be tapped for electricity or direct heating. This heat comes from the planet’s formation and ongoing radioactive decay, and it reaches the surface as heat flow. Engineers access it by drilling to hot rocks or underground reservoirs of steam or hot water; that steam can drive turbines to generate electricity, while the hot water itself can be used directly for heating buildings, heating greenhouses, or industrial processes. Geothermal energy provides reliable baseload power with low emissions and a small land footprint, but it depends on having suitable geological conditions and is more location-specific. The other descriptions don’t fit because geothermal energy is not sourced from the Sun, wind interacting with the ground, or burning seaweed; it comes from the Earth’s internal heat.