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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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  • 50 percent more than today.
  • 20 percent more than today.
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Random In The Forums

LILDUA
LILDUA posted in General:
a kind of insect .. it can fly and have fastest speed more then light XD what is the job of a doctor?
reply about 4 hours
puppybuddy123
puppybuddy123 posted in General:
So we are an a darker environment and can change into bats easier. What is a horse?
reply about 4 hours
SyedaHuma
SyedaHuma posted in General:
flaura
reply about 4 hours
Abbergrl
Abbergrl posted in General:
Because sometimes we have nothing to do and we get bored. We get so bored that we become afraid of dying of boredum. So, we just close our eyes and go to sleep :D Why do we use lights?
reply about 4 hours
LILDUA
LILDUA posted in General:
table? Well it is used as snacks XD.. when watching movie must eat this.. XD y we sleep?
reply about 5 hours