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Hello Motto Essay

4184 words - 17 pages

Title: SOLAR ENERGY:
“SUNLIGHT into USEFUL ELECTRICITY”

>Introduction<
In today's climate of growing energy needs and increasing environmental concern, alternatives to the use of non-renewable and polluting fossil fuels have to be investigated. One such alternative is solar energy.
Solar energy is quite simply the energy produced directly by the sun and collected elsewhere, normally the Earth. The sun creates its energy through a thermonuclear process that converts about 650,000,000 tons of hydrogen to helium every second. The process creates heat and electromagnetic radiation. The heat remains in the sun and is instrumental in maintaining the thermonuclear reaction. The ...view middle of the document...

Solar energy is the energy received by the earth from the sun. This energy is in the form of solar radiation, which makes the production of solar electricity possible. Solar energy is vital to support life on earth, it helps to grow our food, light our days, influence weather patterns, provide heat, and can be used to generate solar electricity.
Solar electricity relies upon man-made devices such as solar panels or solar cells in order to provide a source of clean, and low cost renewable energy.
We have used energy from the sun to provide electricity for many years, in the form of solar cell calculators and other small, low energy consuming devices.
As solar energy technologies become more advanced, we are able to exploit the energy we receive from the sun to provide a greater, significant amount of our electricity or even hot water (when using solar hot water panels).
The solar energy definition above mentions how energy from the sun is transported to earth through the form of solar radiation. Photons contained in this solar radiation makes the generation of electricity from the suns rays possible.
Solar energy is also partly responsible for wind energy, as wind patterns are greatly influenced by the sun. Also, the sun is responsible for heating the ground beneath our feet to a significant degree to support the use of geothermal, ground source heat pumps.
Without the existence of solar energy, human life could not be supported on planet earth due to many different factors.
Sunlight is a clean, renewable source of energy. It is a sustainable resource, meaning it doesn't run out, the supply can be maintained. 

Objective/hypothesis
Our project’s objective is to know how the sunlight from the sun becomes electricity. To know the advantages and the disadvantages of solar energy, the uses, and the different kinds of solar technology.  Our hypothesis was: we think that solar energy can be used to power electronic appliances while not polluting the environment. Our goal is to learn how solar energy works, and in which situations it can be used.
History
Solar energy isn’t new. Its history spans from the 7th
Century B.C. to today. We started out concentrating the
sun’s heat with glass and mirrors to light fires. Today, we
have everything from solar-powered buildings to solar powered vehicles.

IN 1838 
Edmund Becquerel observed and published findings about the nature of materials to turn light into energy. They were considered interesting, but were not pursued. He is credited with the discovery of the photovoltaic effect, the operating principle of the solar cell, in 1839.

Advantage and disadvantage
Solar power has two big advantages over fossil fuels. The first is in the fact that it is renewable; it is never going to run out. The second is its effect on the environment.
While the burning of fossil fuels introduces many harmful pollutants into the atmosphere and contributes to environmental problems like global warming and...

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