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Transcript of SOLAR ENERGY
WHAT IS SOLAR ENERGY?
Solar energy is a type of energy that we get from the sun. The sun is the source of solar energy. Also the sun gets it's energy from Nuclear Fusion. Everything in the universe is made out of elements. An atom is one of the most smallest elements. An atom has a center called a Nucleus. When 2 nuclei from 2 atoms join that is called a Nuclear Fusion. The sun gets lots of energy when a fusion happens. That energy comes to us as heat and sunlight.
An atom is an element. It is very fascinating. Here are some pictures of an atom.
A FACT INSIDE A FACT
The temperature on the sun gets as high as 10,000 degrees Fahrenheit [5,500 Celsius]!!! That is the energy that the Nuclear Fusion creates!!!
IS THE SUN RENEWABLE OR NONRENEWABLE?
The sun is a renewable source for a few more billion years. Like everything else in the universe including planets and stars, the sun has to die. Scientists say that the sun would die because it's going to lose it's hydrogen fuel. Solar energy would not exist without the sun.
USING SOLAR ENERGY
There are many uses of solar energy. Some examples are: solar panels, solar vehicles, solar cookers, solar fans, solar chimneys, solar powered batteries and computers are sometimes powered by solar energy too. I will explain some solar powered stuff to you.
Solar panels are panels that you can put on something like your house so that your whole house will be running on solar energy. These panels are very expensive but also very useful. They are expensive because they only have been used for a short time so far. If you want something that needs solar energy then you would find that almost all the stuff that requires solar energy has solar panels on top. The panels also have small squares on them like on the picture below.
Did you know that 35% of people from the world used solar energy in 2013???
Solar vehicles are cars and trucks powered by solar energy. Again they have solar panels on them to make them work. A solar car looks like this:
As you can see these cars are not big enough to fit a person but instead the person controls the car with a remote controller.
Also there is a race which contains these cars. That race is called The American Solar Challenge. These cars have to race from Chicago,Illinois to Claremont, California. Solar powered cars weigh less than 1/3 of a normal car.
Did you know that colleges, companies and clubs from around the world compete in this race?
Solar panels are made out of solar cells and those solar cells are made out of silicon. Silicon is kind of like sand. Solar cells can also be called Photovoltaic cells.
A FACT INSIDE A FACT
Here are the parts of a solar panel:
- Antireflection coating - Substrate
- Transparent adhesive
- Cover glass
- Front contact
- N-type semiconductor
- P-type semiconductor
- Back contact
A FACT INSIDE A FACT
The 2003 winner of the American Solar Challenge was the car built by a group from the University of Missouri-Rolla.
HOW DO WE USE THIS ENERGY?
LONG-TERM AND SHORT- TERM EFFECTS
Solar energy has some effects on the environment and us humans too. Here are some of those effects:
Long Term Effects- You have to take very good care of them because if you leave them in very, very hot weather and freezing cold weather they will eventually break down.
Short Term Effects- They cost a lot of money. To get the materials, construction and installation it costs about 20,00 dollars altogether!!!
Long Term Effects- A big effect on the environment is that solar energy doesn't pollute like fossil fuels. We dig fossil fuels from the ground or in the water. When we dig under the water for oil sometimes the oil spills that causes water pollution. When we burn coal the factory smoke rises. For solar energy the solar panels just absorbs the sun's light and turns it into electricity.
Short Term Effects- When solar panels are made the air can get polluted.
A layer that underlies something.
A transparent thing that is used for sticking objects.
HOW CAN WE CONSERVE THIS ENERGY?
We can use solar energy when solar panels harness the sun's light to heat our homes and water. You can install solar panels almost anywhere where the sun shines a lot.
TRANSFORMING SOLAR ENERGY INTO OTHER ENERGIES
Hydroelectric energy- The sun drives the water cycle. Without the water cycle hydroelectric power would not be possible. So after the sun evaporates the water, condensation happens and then heavy clouds form and it starts to rain. The rain flows into lakes and rivers. Then hydroelectric power is made by the flowing lakes and rivers.
Did you know that almost all the energies start out as solar energy? Here are some examples:
Wind energy- Solar energy also makes wind energy. The sun heats some pockets of air. When the warm air hits the cooler air wind is created. Then you can use the wind to make wind energy.
POINT F VIEW
My point of view for solar energy is that it's very useful, helpful to both humans and environment and that it's a renewable energy for a few more billion years so you wouldn't have to worry about it ending soon. For me solar energy is a positive thing for the future and the present. There are some negative impacts but most are positive. So you should start buying those solar panels right away!!!
SOLAR ENERGY PLANTS
Not many solar power plants are found but 2 kind can be found. The first type uses solar cells to make sunlight directly into electricity. The second type uses mirrors to concentrate light that heats a liquid. The flat mirrors reflect light at a tower. The tower is filled with a liquid. Sunlight heats the liquid to a high temperature. The liquid is then piped through tanks of water. The water boils to create steam. The steam turns fan-shaped turbines that are connected to a generator. The generator make electricity. Those were the main part of a plant.
We can conserve this energy by planting more trees because 1 solar energy system equals to about 500 cut down trees!!! Without trees there would be no solar panels left.
- Solar Energy [book]