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Which of these is one of the initial sources of carbon dioxide in Earth's atmosphere? A. respiration B. meteoroids C. photosynthesis D. burning fossil fuels
Meteoroids is one of the initial sources of carbon dioxide in Earth's atmosphere.
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Asked 8/19/2016 11:51:39 AM
Updated 8/20/2016 9:08:50 AM
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Confirmed by jeifunk [8/20/2016 9:08:50 AM]
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Most of the carbon dioxide that was once part of Earth's atmosphere can now be found in _____. A. fossil fuels B. the oceans C. carbonate rocks D. living things, such as plants
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Which of the following spheres does not directly interact with the atmosphere as part of the carbon cycle? A. biosphere B. exosphere C. geosphere D. hydrosphere
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