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Solar Energy

Solar energy is a clean, renewable source of energy.
Solar Energy

With the price of non-renewable energy sources soaring, Kidzworld takes a look at the environmentally friendly energy source we all know and love - our sun! Get the goods on solar energy right here!

How It Works

Solar energy is the energy we acquire from the sun. Millions of years before humans realized the sun's potential as a renewable energy source, plants were using the sun's energy to convert carbon dioxide and water into sugars to eat. This process is called photosynthesis. Today, we have tried to copy plants by creating something called photovoltaic (PV) cells. These man-made cells are comprised of semiconductors, which are materials that are able to absorb light energy. The most commonly used semiconductor today is silicon because it is, so far, the most cost-effective material. The silicon absorbs a portion of the energy from the light that shines down on it, electrons are suddenly knocked free and are channeled to flow in the same direction by electric fields within the PV cell. On both the top and bottom of the silicon, metal contacts are placed and, through these contacts, the solar energy is extracted and stored.

Practical Uses

Solar energy is used for a variety of different things but the ones that you are most familiar with are solar-powered calculators, solar-heated swimming pools and maybe even the hot water in your house is heated by solar panels. Because solar energy is clean and renewable, it would be ideal to make a move from non-renewable heating sources like gas to solar on a grander scale, so research is ongoing to make solar energy a more cost-effective alternative for people around the world.

Did U Know?

  • Solar energy is measured in kilowatt-hours. One kilowatt hour (kWh) is the amount of energy needed to burn a 100 watt light bulb for 10 hours.
  • Enough sunlight falls to Earth every hour to meet the world's energy demands for an entire year - the trick is learning how to extract that energy in a cost-effective way.
  • Approximately 10,000 homes in the United States are run entirely on solar power.
  • Solar energy can even be used to cook food!
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Comments

dzaystream

dzaystream wrote:

thanks i needed this :)
commented: Wed Apr 09, 2014

Anastacio

Anastacio wrote:

I've used the heat from the sun, a cardboard thing I made, black colored paper and cook...
commented: Sat Feb 22, 2014

JennyD

JennyD wrote:

It's a good way to save
commented: Wed Sep 25, 2013

there are 5 more comments

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Random in the forums

Taidoku
Taidoku posted in Debating:
we will likely kill ourselves (from my theory) with a mass war
reply 5 minutes
wolfiegal
wolfiegal posted in General:
reply 6 minutes
Elizabeth221
Elizabeth221 posted in Debating:
huh???
reply 6 minutes
LAZY778
LAZY778 posted in Debating:
"Taidoku" wrote: "LAZY778" wrote: "Teh_Skittlez" wrote: "CocoC01" wrote: In my opinion, our world will end when our world is totally dried up. Because our Earth`s ozone layer is getting thinner day by day. It is due to the selfishness of humans which do not care about the current issues of our Earth`s problems. Human activity like too much usage of air conditioners and people who do not close refrigerator properly may cause the thinning of the precious ozone layer. The examples that I`ve listed release CFC. This CFC will mix with the nitrogen in the air and cause the ozone layer to decrease. This may cause more UV light rays to enter Earth and causes the earth temperature to increase little by little every day. As the years go by Earth will dry up one day due to the high temperature and no protection given by the ozone layer for the human race to live in this world. I'm not saying that global warming isn't a significant issue or that it doesn't need our attention, I just don't think it's going to be what kills us. It might kill a lot of everything else, but I don't think it'll kill us.    Well what will die from global warming? "LAZY778" wrote: "Teh_Skittlez" wrote: "CocoC01" wrote: In my opinion, our world will end when our world is totally dried up. Because our Earth`s ozone layer is getting thinner day by day. It is due to the selfishness of humans which do not care about the current issues of our Earth`s problems. Human activity like too much usage of air conditioners and people who do not close refrigerator properly may cause the thinning of the precious ozone layer. The examples that I`ve listed release CFC. This CFC will mix with the nitrogen in the air and cause the ozone layer to decrease. This may cause more UV light rays to enter Earth and causes the earth temperature to increase little by little every day. As the years go by Earth will dry up one day due to the high temperature and no protection given by the ozone layer for the human race to live in this world. I'm not saying that global warming isn't a significant issue or that it doesn't need our attention, I just don't think it's going to be what kills us. It might kill a lot of everything else, but I don't think it'll kill us.    Well what will die from global warming? well, sea levels will rise, and in an extreme case, can drown people, and drown whole cities (which will likely not happen in our lifetime) Yes that will happen because of  global warming.
reply 7 minutes
LAZY778
LAZY778 posted in Debating:
"Ilikeham123" wrote:####! (German for no) has anyone read mine- the sun will start to die and expand outwards in 5.4 billion years time and it will swell over Mercury Venus and Earth. I read it but with what we are doing to our planet mankind won't exist by then so that theory is right of course but we won't well mankind won't exist. 
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