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Atmosphere

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QuestionAnswer
The Earth's atmosphere has changed over ____ ___ Geologic time
What percentage of the Earth's atmosphere is nitrogen? 78%
What percentage of the Earth's atmosphere is oxygen? 21%
What percentage of the Earth's atmosphere is trace gases? 1%
Biologic activity affects the atmosphere ability to hold what? Heat
Humans have added carbon dioxide to the atmosphere through burning of what? Fossil fuels
Oxygen sinks (oxidation of metals and animals) reduce that amount of what in the atmosphere? Oxygen
The earliest atmosphere contained what? Hydrogen and helium
Mercury has no atmosphere therefore it has no what? Greenhouse affect.
Ice and snow reflects better than what? Land and ocean water
Created by: hcps-cannonjk
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