M Long A3.An Inconvenient Truth_1

M Long A3.An Inconvenient Truth_1 - Assignment 3. An...

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Assignment 3. An Inconvenient Truth. 1. “Global Warming” is the topic of An Inconvenient Truth . 2. The earth consists of the atmosphere, biosphere, hydrosphere and lithosphere. Because of its thinness, humans have the most impact on the atmosphere. 3. The sun’s radiation comes in the form of light waves and heats up the earth. Most of the radiation is absorbed by the Earth and warms it. Some energy is radiated back into space by the earth in the form of infrared waves. The greenhouse effect comes about when some of outgoing infrared radiation is trapped by the atmosphere and warms the earth. 4. Annual downturns in carbon dioxide production are caused when the Northern Hemisphere is turned towards the sun in our Spring and Summer seasons so that the vegetation on the northern continents is in full bloom, absorbing carbon dioxide and creating oxygen. 5. Lonnie Thompson uses core drills to measure past carbon dioxide and oxygen levels. He and his colleagues can also measure the different isotopes of oxygen to determine the exact temperature at the time a gas bubble was trapped in the snow. 6. Core samples of tropical mountain glaciers can measure the last thousand years of carbon dioxide levels and temperature. 7. In Antarctica, scientists can take measurements as far back as 650,000 years using the
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This note was uploaded on 07/24/2010 for the course SMT 312 taught by Professor Staff during the Winter '10 term at CSU Dominguez Hills.

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M Long A3.An Inconvenient Truth_1 - Assignment 3. An...

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