Before the Industrial Revolution, man based most of their technology on the burning of natural gasses or fossil fuels. The constant breakdown of these elements over time has released large amounts of harmful chemicals and gasses into the atmosphere. Global warming is just one of the many results that has been ... death. Serious interest in the fuel cell as a practical generator did not begin until the 1960's, when the U.S. space program chose fuel cells over riskier nuclear power and more expensive solar energy. According to www.fuelcells.org. The fuel cell was much more efficient for them....

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• Grade Level: High School

... the absorption rate can be done by using helium balloons, from high altitude planes and also satellites. When scientists are analysing the ozone, they need to consider which species absorb solar radiation, the wavelength of the radiation absorbed and the strengh of the absorption. They also need to find out what happens when radiation has been absorbed. The absorbed energy may ... using spectroscopic instruments at different times after the flash. An expression is then used to find the rate of reaction: Rate of reaction=k(O2)(O) K=rate constant (O2)(O)=concentrations of oxygen atoms and...

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... the ground at a global average of about 60 degrees Fahrenheit. Without that, the average would be below the freezing point of water. The gases have this effect because as incoming solar radiation hits the surface, the surface gives off infrared radiation. The effect is like when a greenhouse traps heat, which is where we got the name greenhouse effect. Scientists are scared ... a global increase in atmospheric carbon dioxide, largely as a result of the burning of fossil fuels. If the many other determinates of the earth's present global climate remains more or less constant, the CO2 inc...

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... it is today. When Earth was formed it was a ball of molten rock with a thin atmosphere consisting of hydrogen and helium. These gases quickly escaped from the atmosphere because of solar wind, extreme heat and the ultra-light weight of these elements. When the gases escaped, Earth was left without an atmosphere. However, Earth was slowly evolving. The Earth had ... constant geological activity that created extreme volcanism. The volcanoes spewed out gases that went into the atmosphere. The two most important gases were H2O and CO2. The H2O collected in the ... ...

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Mars is the Fourth planet from the Sun and also the third largest terrestrial planet in our Solar System with a diameter of 6,792km which is roughly half of Earth's. Mars also gets its reddish appearance from Iron Oxide (or rust) in its soil. It has an almost constant view of at least one of its two moons Phobos and Deimos. Phobos is quite ... ...

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• Grade Level: High School