The former are thin boxes with a see-through cover, which are placed of the top of roofs and facing the sun. ... Concentrating collectors are more expensive and complicated; therefore, they are more beneficial for uses such as air conditioning and central power generation. ... For cooling purposes, an absorption air conditioner or refrigerator uses a solar collector that stimulates the cooling process. ... These PV cells are typically grouped into modules of approximately 40 cells. ... Plants use photosynthesis to convert the solar energy into chemical energy. ...

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• Has Bibliography

Flat plate collectors are thin boxes with a see-through cover. ... They are more useful when it comes to air conditioning and central power generation. ... For the purposes of cooling, an absorption air conditioner uses a solar collector that stimulates the cooling process. ... These PV cells are commonly grouped into modules of about 40 cells. ... Energy would be converted to microwaves before being transferred to multiple antennae on Earth to be converted into electric power. ...

• Word Count: 720
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• Grade Level: Undergraduate

Instead some pores are filled with water, and others with air. ... An example of capillary forces exceeding gravity is capillary rise in a thin glass tube, where water is lifted upwards against the force of gravity. ... As a result, water in the unsaturated zone is preferentially drawn into small spaces over large ones, which tend to be occupied by air. ... Toxic waste that has leaked from containment facilities has seeped into the ground. ... The primary source of surface water is spring discharge from highly fractured plutonic rocks into streams along mountain foothills (INEGI, 1986). ...

• Word Count: 696
• Approx Pages: 3
• Has Bibliography
• Grade Level: Undergraduate

Ozone Layer Depletion Imagine a world with bad air, polluted water, starvation, increased cancer conditions and even limited land. ... The Earth's atmosphere is divided into several layers. ... Out of each 10 million air molecules, about 2 million are normal oxygen, but only 3 are ozone. ... When the ozone layer begins to thin, it lets more UV rays enter our atmosphere. ... The ozone layer is thinning; and the thinner it gets the more that future will continue to haunt us. ...

• Word Count: 942
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• Grade Level: High School

In fact, atmospheric gases are often divided up into the major, constant components and the highly variable components, as shown in Table 1 and Table 2. ... Scientists divided the atmosphere into four layers according to temperature: troposphere, stratosphere, mesosphere, and thermosphere. ... THE OZONE LAYER The stratosphere contains a thin layer of ozone molecules (with three oxygen atoms) which forms a protective layer shielding life on Earth from the Sun's harmful ultraviolet radiation. ... Some gases in the exosphere actually escape into space. Particles of the solar winds are conc...

• Word Count: 3528
• Approx Pages: 14
• Grade Level: High School

Before my feet would move, I fell into a trance. ... As I stared down the aisle, into thin air, my mind kept replaying the most horrific night of my life. ... I placed myself into the hands of another man, once more, but this time I was surer. ...

• Word Count: 766
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• Grade Level: High School

As mankind begins to venture deeper into the 21st century, the need for energy grows every day. ... The current environmental crisis has directed the energy focus into green forms of energy. ... Without environmental protection laws, the harmful fumes are not properly harnessed and are let freely go into the air. ... Not only is the air polluted in the creation of solar panels, but the physical earth is damaged as well. ... The heavy equipment requires large amounts of fuel and oil to operate, therefore polluting the air even more. ...

• Word Count: 1804
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• Has Bibliography

As I stepped out of the car, I got my first taste of the salty sea air. ... I wiggled my toes in the thin South Carolina sand that had been warmed by the sun. ... The sun hid behind the clouds for a while and then suddenly descended into the never-ending sea. ... As I walked into the dining area I glanced at the counter. ...

• Word Count: 659
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• Grade Level: High School

Telescopes and spacecraft have led scientists into the mysterious unknown - space. ... This causes the release of bubbles of gas and magnetic fields that explode into space. ... Like Earth hot air that rises at the planet's equator is replaced with cooler air. Trade winds result from the cooler air to circulate the dust. ... Dust storms also can turn the color of clouds into yellow or red. ...

• Word Count: 4020
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• Grade Level: High School

For example, ash that is spewed from an active volcano can reach up into the atmosphere and reflect solar radiation, essentially dimming the sun. ... The greenhouse effect may be a natural cause, but the air pollution of humans has increased its ability to retain heat. ... Its ability to rip the ozone apart with its free chlorine atoms leads to the thinning of the ozone and therefore more ultra violet radiation hitting earth's surface (IPCC, 2007). ...

• Word Count: 910
• Approx Pages: 4
• Has Bibliography