Atmospheric constituents controlled by - correct answer ✔✔geologic, biological, and anthropogenic
Geologic Control - correct answer ✔✔Early atmosphere consists of CO2 and CH4. Start of anerobic life.
Age of bacteria. 2.3 billion years of CO2 and CH4 abrupt change in atmospheric conditions.
Biological Control - correct answer ✔✔Oxygen appearance and start of aerobic life. Thermal conditions
caused by variation of CO2 change. Gaia Hypothesis.
James Lovelock - correct answer ✔✔Proposed the Gaia Hypothesis in 1970s to explain the interaction of
climate with biology.
Gaia Hypothesis - correct answer ✔✔Suns output of energy increased as time went on which caused the
switch from anaerobic or aerobic conditions. Initial solar output produced greenhouse effect and
greenhouse gases (CO2 and CH4). Life has controlled the atmosphere.
Anthropogenic Control - correct answer ✔✔Photosynthesis occurred. CO2 is released from the air. Dead
plants turn into CO2 form through oxidation process. But some plant material turn into fossil fuels.
, Photosynthesis - correct answer ✔✔Plants take CO2 in the atmosphere and create plant material like
long carbon chains.
Fossil Fuels - correct answer ✔✔Such as coal and oil are made from dead plant. Geologic pressure
converts the plant material into fossil fuels. Stored under the earth and rapid release of this is what
causes smog, acid rain, and global warming.
Coal - correct answer ✔✔First anthropogenic modification of the atmosphere.Industrialization of China
was when coal was used to forge steel. Britian invented steam engine with coal during the industrial
revolution. Spread to the industrialization of the Northeastern US.
Atmosphere Composition - correct answer ✔✔Matter can appear in solid liquid or gas.
Gas Atmosphere - correct answer ✔✔Most common phase in the atmosphere. Consists of permanent
and variable gases.
Permanent Gases - correct answer ✔✔Gases with fixed percentages and those that are variable in their
concentrations. Dynamic and not static equilibrium.
Static Equilibirum - correct answer ✔✔Produced when there are no creation and destruction processes.
Variable Gases - correct answer ✔✔Referred to as greenhouse gases.
Greenhouse gases - correct answer ✔✔An Atmospheric constituent that traps outgoing terrestrial
radiation. Re-radiation to the earth causes the temperature to rise and the earth to warm up.
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