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two main gases in atmosphere

nitrogen and oxygen


transfer of energy through space in the form of waves


transfer of heat through atoms colliding


transfer of heat because of density differences; liquid or gas only


closest layer of atmosphere to the earth; where weather occurs


hottest layer of the atmosphere

greenhouse effect

infared radiation remains in Earth's atmosphere


incoming solar radiation

when Earth receives the most energy

when the Sun is directly overhead


brownish haze caused by automobile exhaust

acid rain

pollutants in the water vapor in the air that causes harm to plants, animals, and structures

ozone depletion

increased exposure to ultraviolet radiation

global warming

global temperatures rising caused by human activities and greenhouse gases

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