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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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6 Comments

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How Much Energy Will We Use By 2015?

  • 50 percent more than today.
  • 20 percent more than today.
  • 25 percent less than today.
  • 100 percent more than today.

Random In The Forums

-Gwen9--
-Gwen9-- posted in Debating:
"AlphaT" wrote: "donteatcarrots" wrote:​no. it's mainly the people who are given the guns that need to be properly checked. the guy who killed 49 people in orlando had mental health problems and trouble with the fbi was still given a gun. this doesn't make sense at all to me. yeah he probably has knives and stuff at home which could do just as much harm- so is the gun necessary in the first place? No one is given a gun. A person has to acquire a permit, and then has to buy a gun for themselves.  Okay, yes, mental health is an obvious issue. But it needs to be for specific mental health problems. It can't be just because someone has a mental illness, because many mental illnesses won't effect the operation and use of a gun, or make it more likely for a person to hurt someone else with a gun. I support background checks which would include mental health history, but only if it's done right. Similarly, the guy who killed 49 people in Orlando was taken off the FBI watchlist. This tells me that there are flaws with the way that the watchlist is currently being used. Once that system is redone, then we can restrict those on it from buying firearms. But at its' current success rate? Not a chance.  And it's not about what's necessary...well to an extent it is, but hear me out. Weapons are used for self defense. No matter how many gun laws you have, criminals will still use firearms in their crimes. Citizens require at least an equal amount of protection that criminals use to break the law.  In other words, if you were to be the victim of gun violence, would you rather have with you a knife or a gun? Would you honestly bring a knife to a gun fight?  First of all, I agree with you. Mental health is definitely an issue! But together these issues can be addressed!!!! And as I said earlier, we can control our weapons. The government can create a harder way to get a gun or any weapon. Look at criminal records!!!! Even before getting a permit, or a license, CHECK THE RECORDS!!! This will help prevent these mass shootings.
reply about 2 hours
Hoellu
Hoellu posted in Debating:
"-Gwen9--" wrote:The second amendmant in the United States Constitution is the right to bare arms. If they take away our weapons, then they take away the second amendmant. The amendmant is there for a reason. Weapons are useful for protection. Protection is going to keep us alive. The human population, as a nation, and as a world! If we take away our weapons now we are all dead! We don't want that.  Now, killing 50 people in the Orlando shooting. That is just not right at all. It was not the gun's fault, it was the person. Same thing with the death of Christina Grimmie. Now, I personally believe that we should not take guns away, but we should find a harder process into buying a gun or some other weapon, and we should be trained properly! Look at people's criminal records, look at their other records. I don't care! As long as we still have protection, but less mass shootings! Omg, so true.
reply about 2 hours
AdeleQxeen
AdeleQxeen posted in Electronics:
I have one. I got it for my birthday last year, it's a Samsung Core Prime.
reply about 2 hours
Hoellu
Hoellu posted in Debating:
If there are polices, why are there weapons for almost anyone?Or at least they should have an special permission.
reply about 2 hours
AlphaT
AlphaT posted in Debating:
"donteatcarrots" wrote:​no. it's mainly the people who are given the guns that need to be properly checked. the guy who killed 49 people in orlando had mental health problems and trouble with the fbi was still given a gun. this doesn't make sense at all to me. yeah he probably has knives and stuff at home which could do just as much harm- so is the gun necessary in the first place? No one is given a gun. A person has to acquire a permit, and then has to buy a gun for themselves.  Okay, yes, mental health is an obvious issue. But it needs to be for specific mental health problems. It can't be just because someone has a mental illness, because many mental illnesses won't effect the operation and use of a gun, or make it more likely for a person to hurt someone else with a gun. I support background checks which would include mental health history, but only if it's done right. Similarly, the guy who killed 49 people in Orlando was taken off the FBI watchlist. This tells me that there are flaws with the way that the watchlist is currently being used. Once that system is redone, then we can restrict those on it from buying firearms. But at its' current success rate? Not a chance.  And it's not about what's necessary...well to an extent it is, but hear me out. Weapons are used for self defense. No matter how many gun laws you have, criminals will still use firearms in their crimes. Citizens require at least an equal amount of protection that criminals use to break the law.  In other words, if you were to be the victim of gun violence, would you rather have with you a knife or a gun? Would you honestly bring a knife to a gun fight? 
reply about 2 hours