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Geothermal Energy

The prefix geo-, like you've seen before in the words 'geology' and 'geography', is a Greek work meaning Earth. The term thermal is similar to the word thermometer and thermal underwear, and it means heat. We put the terms together in the word geothermal to describe heat coming from the earth. There are two sources of Earth's heat, or geothermal energy: the leftover heat from the formation of our planet and radiogenic heat, which is the heat resulting from radioactive decay within Earth. Both heat sources are naturally occurring and provide abundant energy that can be harnessed for human energy needs.

Capturing Earth's Heat

Prehistorically, and until recently, people could only make use of geothermal energy that made its way to Earth's surface, primarily as geothermal hot springs used for recreational and medicinal bathing. The oldest known pool created for this purpose was built in China in the 3rd century BCE, during the Qin dynasty. Today, geothermal baths continue to lure relaxing vacationers. The water in these hot springs is warmed as it comes into contact with rocks heated by magma below the earth's surface, so the springs are most common in volcanic areas.

In the 20th century, people started using geothermal energy for electricity generation instead of, or as a supplement to, oil, natural gas, coal, and nuclear power sources. With greater drilling capabilities came the ability to penetrate deep, underground steam reservoirs. Although geothermal energy is present everywhere on Earth, it is still most easily accessible in volcanic areas, which can typically be found above subducting tectonic plate boundaries, where one tectonic plate sinks beneath another, partially melting and creating volcanoes at the earth's surface, such as in Alaska and Japan; near divergent plate boundaries, where tectonic plates pull away from each other and magma rises to the surface, such as in Iceland; and over hot spots, where mantle material rises beneath the crust, such as in Hawaii and Yellowstone National Park. In these areas, magma is found at shallow depths, bringing geothermal heat close enough to the surface to be drilled and captured for our use at geothermal electricity stations.

Advantages of Geothermal Energy Use

Harnessing geothermal energy can have fewer environmental impacts than exploiting other energy sources. As a cleaner resource, there tends to be little airborne emissions from geothermal electricity stations. Highly developed drilling methods safely tap into geothermal energy reservoirs with little risk of releasing geothermal fluids, and the land area over geothermal reservoirs can still be used as farmland.

As an alternative to oil, natural gas, and coal, geothermal electricity produces far fewer carbon emissions. It, therefore, does not contribute as much to greenhouse gas production and the resulting climate change. Unlike fossil fuels, which require millions of years of heat and pressure to produce, geothermal energy is considered to be a renewable resource. The earth's heat sources are limitless on the timescales of human life, and we need only water in contact with this heat to produce steam to capture for our electricity consumption.

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advantages & disadvantages - video & lesson transcript | study.com

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What Is Geothermal Energy? - Definition, Advantages & Disadvantages - Video & Lesson Transcript | Study.com

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The prefix geo-, like you've seen before in the words 'geology' and 'geography', is a Greek work meaning Earth. The term thermal is similar to the word thermometer and thermal underwear, and it means heat. We put the terms together in the word geothermal to describe heat coming from the earth.

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a renewable energy source that can be powered by wind (windmills)

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energy from plants and animals that can be used as fuel

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Wind spins turbine blades shaped like propellers

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Geothermal ALSO consists of a turbine that is spun by heated rising air.

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Renewable Energy 101: How Does Geothermal Energy Work?

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water flows through turbines which generates electricity

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Plant products and other bio flammable products that can be processed into ethanolor other bio feuls

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flowing water is energy because it spins a turbine

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solar energy is where there is solar panels set up, and it takes sun rays into energy.

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Geothermal energy is the heat from the Earth. It's clean and sustainable. Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma.

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http://c03.apogee.net/contentplayer/?coursetype=kids&utilityid=impa&id=16167

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it is when they put flowing water in a turbine which is very a lot like wind

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splitting urainuim to creat heat which rises powering a generator

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https://www.comfort-pro.com/2015/06/geothermal-energy-pros-and-cons/

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Pros and Cons
https://www.solarreviews.com/blog/pros-and-cons-of-solar-energy

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https://www.youtube.com/watch?time_continue=47&v=JbJ7AVHBQfs

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https://www.renewableresourcescoalition.org/nuclear-energy-pros-cons/

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https://www.tva.gov/Energy/Our-Power-System/Hydroelectric/How-Hydroelectric-Power-Works

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https://www.youtube.com/watch?v=q8HmRLCgDAI

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What is Nuclear Energy? | National Geographic

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https://www.khanacademy.org/partner-content/nova/energy/v/windpower

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https://www.youtube.com/watch?v=-jln6yi7LF0

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3 Reasons Why Nuclear Energy Is Terrible! 2/3

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Renewable Energy 101: How Does Biomass Energy Work?

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3 Reasons Why Nuclear Energy Is Awesome! 3/3

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https://www.google.com/search?q=nuclear+energy+video&rlz=1C1LENP_enUS811US811&oq=nuclear+energy+video&aqs=chrome..69i57j0l5.6295j0j1&sourceid=chrome&ie=UTF-8

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https://www.youtube.com/watch?v=rcOFV4y5z8c

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https://www.studentenergy.org/topics/biomass

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Renewable Energy 101: How Does Biomass Energy Work?

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https://www.youtube.com/watch?v=lLqF8LliTTI

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https://www.youtube.com/watch?v=nlpD6BT0YuM

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hydroelectric power advantages and disadvantages

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Hydroelectricity Pros and Cons You Must Be Aware Of

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Hydroelectricity is increasingly being looked at as a feasible source of renewable energy. In the simplest terms, it is the electricity that is generated using flowing water, or that water which is stored in a reservoir. Although hydroelectricity is a renewable and highly beneficial energy resource, it is essential to consider its possible negative effects on the environment.

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https://www.youtube.com/watch?v=4pnll5qLIgg

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https://www.youtube.com/watch?v=rcOFV4y5z8c