E Experiencing chemical reactions with each other which release energy Although

E experiencing chemical reactions with each other

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E., Experiencing chemical reactions with each other, which release energy. Although it is true that squeezing air warms it, the pressure does not set the temperature (change in pressure brings change in temperature), and, the greenhouse gases are really very rare and don’t affect pressure much. The production and breakdown of the greenhouse gases roughly balance energetically, and any slight imbalances are tiny compared to the radiative effects of the gases. Convection currents are blocked by the glass of greenhouses, but not by greenhouse gases. But CO2 does absorb some of the infrared radiation emitted from the planet. Absorbing an infrared photon puts a CO2 molecule into an excited state, and fairly quickly the molecule returns to its unexcited state by emitting a photon of the same energy. Some of those photons emitted by excited CO2 molecules head back toward Earth (the emission direction is random). So, the CO2 serves to trap energy in the Earth system, warming the planet so thFat it glows more brightly to shove infrared radiation past the CO2, achieving a new balance. , Points Earned:, 1/1 Correct Answer:, B Your Response:, B 11., The United Nations-sponsored Intergovernmental Panel on Climate Change shared the 2007 Nobel Peace Prize. The information that the Panel has supplied to policymakers includes: , A., The observed rise in atmospheric CO 2 levels has been caused primarily by a sudden increase in explosive volcanism, and is having no effect on the climate. B., The observed rise in atmospheric CO 2 levels has been caused primarily by human fossil-fuel burning, and is having no effect on the climate. C., The observed rise in atmospheric CO 2 levels has been caused primarily by a sudden increase in explosive volcanism, and is causing the climate to warm. D., The observed rise in atmospheric CO 2 levels has been caused primarily by human fossil-fuel burning, and very likely is causing warming of the climate that is likely to become much larger if we continue our current behavior. E., The observed rise in atmospheric CO 2 levels has been caused primarily by human fossil-fuel burning, and very likely is causing warming of the climate that is unlikely to become much larger.
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, Points Earned:, 1/1 Correct Answer:, D Your Response:, D 12., The United Nations, under the auspices of the Intergovernmental Panel on Climate Change, has attempted to assess the scientific understanding of how greenhouse-gas emissions will affect the climate, and thus people. The UN reports show that if we continue on our present path, burning fossil fuels at a faster and faster rate: , A., Climate will change, with cooling at high latitudes that primarily will hurt wealthy people living in those cold places. B., Climate will change, primarily getting warmer, and those changes will primarily hurt poor people in warm places, but the climate changes are primarily being caused by wealthier people in colder places.
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  • Fall '08
  • ALLEY,RICHARDBANANDAKRISHNAN,SR
  • CO2, Correct Answer, Greenhouse gas, Coal, Points Earned

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