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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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General In The Forums

lol589
lol589 posted in Say Anything:
1st April not kidding
reply 40 minutes
lol589
lol589 posted in Electronics:
I use Desktop its more comfortable but laptop is more portable [s:p/1sc3]
reply about 1 hour
brilliantstudent
There's alot of discussion on this in the social media . Many call it as a rumour while many say that they have fooled us . But I wonder why NASA has not answered all these questions to make it clear .
reply about 1 hour
AlphaT
AlphaT posted in Debating:
"bgirlmattyb" wrote: I hate humanity , judge me after you've judged yourself, you'll find we're actually quite the same. Straight or gay , should the gays punish straight people for liking opposite gender? No? Than should straight people punish gays for being attracted to the same gender?  How far does that logic extend though? Should thieves punish non-theives for not stealing things? No? Than should non-theives punish theives for stealing things?
reply about 1 hour
CaptJolee
CaptJolee posted in Debating:
"Taidoku" wrote: The moon landing was a hoax created by the illuminati to trick people into thinking they are actually smart, but it is really the new world order (lizard people) that controls us all don't you mean greys???
reply about 3 hours