volcanoes 3

• A renewable energy source or alternative energy is one that can be replaced in a short period of time such as solar energy ad hydropower energy.
• A nonrenewable energy source takes millions of years to replace or can never be replenished.
• The heat from the Earth’s interior is a source of energy called geothermal energy.
• • geo means Earth and theme means heat therefore it is the energy from the Earth’s heat.
• The steam is pressurized and then spins a generator that makes electricity.
• Magma near the Earth’s surface hears the surrounding rock, which then heats underground water to form geothermal reservoirs.
• Geothermal wells in reservoir bring a mixture of steam and hot water to the surface.
• Geothermal energy is the heat that is stored deep within the Earth that originates from the melted magma and the decay of radioactive substances.