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Old Tuesday, April 07, 2009
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Default Evolution and Pakistan

watch this video, interesting to know Pakistan's link in the evolutionary chain

http://www.youtube.com/v/QLNn7tZJfNY
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Last edited by Princess Royal; Tuesday, April 07, 2009 at 10:35 PM.
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  #12  
Old Tuesday, April 07, 2009
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Default Atmospheric Layers






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Default Global Temperatures



Mean surface temperature anomalies during the period 1999 to 2008 with respect to the average temperatures from 1940 to 1980



Global mean surface temperature anomaly relative to 1961–1990
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Last edited by Last Island; Wednesday, April 08, 2009 at 02:53 PM.
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  #14  
Old Tuesday, April 07, 2009
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Default Ozone Depletion

Now that you know your atmospheric layers, Let's see where Ozone fits in and how it's being troubled by us.

The Ozone Layer
Though part of the Stratosphere, the ozone layer is considered as a layer of the Earth's atmosphere in itself because its physical and chemical composition is far different from the Stratosphere. Ozone (O3) in the Earth's stratosphere is created by ultraviolet light striking oxygen molecules containing two oxygen atoms (O2), splitting them into individual oxygen atoms (atomic oxygen); the atomic oxygen then combines with unbroken O2 to create O3. O3 is unstable (although, in the stratosphere, long-lived) and when ultraviolet light hits ozone it splits into a molecule of O2 and an atom of atomic oxygen, a continuing process called the ozone-oxygen cycle.

This occurs in the ozone layer, the region from about 10 to 50 km (33,000 to 160,000 ft) above Earth's surface. About 90% of the ozone in our atmosphere is contained in the stratosphere. Ozone concentrations are greatest between about 20 and 40 km (66,000 and 130,000 ft), where they range from about 2 to 8 parts per million.

When CFCs meet Ozone

http://www.youtube.com/v/I1wrEvc2URE
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Old Wednesday, April 08, 2009
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Default Atmospheric Composition

Although I have already posted some material on Atmosphere but this yet another very good illustration. Give a reading to the theory of Ozone Depletion and Acid Rain and you'll enjoy this image even more

Atmospheric Composition


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  #16  
Old Wednesday, April 08, 2009
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Writing good essays part 1.............

http://www.youtube.com/v/3yiQ1GNAFpA
........


Part 2

http://www.youtube.com/v/ruxGNo49JEQ


Writing Good Essays Part 3..................

http://www.youtube.com/v/M8Y47kTr5CQ


Writing Good Essays Part 4............................

http://www.youtube.com/v/-IJmXIu7VQY


Writing Good Essays Part 5...................

http://www.youtube.com/v/KovtwthUjRk


Writing Good Essays Part 6......................

http://www.youtube.com/v/gDvocTITNPo
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Old Thursday, April 09, 2009
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Default Plate Tectonics and the formation of Volcanoes (1)

A cross-section of Earth



The Movement of Plate Tectonics



For Reference: The Tectonic Map of the Earth

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Default Plate Tectonics and the formation of Volcanoes (2)

Now, These videos will give you a better idea of what's happening deep down there

Harun Yahya's Explanation of Earth's Layers

http://www.youtube.com/v/FgPbzEkzBek


Continental Drifts and Plate Tectonics

http://www.youtube.com/v/ANeH9W-HMPc
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Last edited by Viceroy; Thursday, April 09, 2009 at 01:11 AM. Reason: Beautifying the format ;)
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Brain and Pyramid

http://www.youtube.com/v/02QzjbLcxiY



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Old Thursday, April 09, 2009
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Default More on Earthquakes





Global Plate Tectonics Motion




Interesting to see how these epicenters lie on the Plate Tectonic Boundries

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