Biology 1005 Final pt 2 population growth and carbon cycle
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Ecological footprint is
an estimate of the amount of land needed to support our multiple demands on Earth’s resources
The Carbon Cycle is
Biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere, and atmosphere of the Earth.
Sources of Carbon
- CO2 atmosphere
- C6H12O6 organism
- H2CO3 ocean
- CH4 animal matter
- CaCO3 organism
The most important feature of the carbon cycle is the circulation of carbon from the ____ environment into the___ ___ ___ and back into the ___ environment.
abiotic, living things (biotic), abiotic
Abiotic ---> biotic environment
Cellular Respiration Process:
Biotic ---> abiotic environment
Photosynthesis: Requires CO2 and produces O2 it also
- Removes carbon from the abiotic environment and restores carbon to the biotic environment
- Examples: plants, cyanobacteria, algae
Cellular Respiration Requires... and produces..
- Requires O2 and produces CO2
- Carbon is removed from the biotic environment and restored to the abiotic environment.
C6H12O6 (sugar) + 6O2 (oxygen) ----------> 6H2O (water) + 6CO2 + ATP (energy)
Is the formula for..
Gases that trap heat in the atmosphere are often called ___ ____
How do greenhouse gasses occur?
Some occur naturally and are emitted to the atmosphere through natural processes and human activities. Other greenhouse gases (e.g., fluorinated gases) are created and emitted solely through human activities
Name the Greenhouse Gases:
- Carbon dioxide
- Nitrous oxide
- Aerosol propellants
What do greenhouse gases do?
Increases the atmosphere’s ability to retain heat
What happens if more CO2 is being produced than can be used?
Result: excess CO2 in the atmosphere
What impact will excess CO2 have?
- Increase heat retained in the atmosphere
- GLOBAL CLIMATE CHANGE
Carbon is relised in the atomspher though ____ ____ performed by plants and animals. This is an exothermic reaction and it involves the breaking down of glucose (or other organic molecules) into CO2 and H2O.
How is Carbon released into the atmosphere?
- cellular respiration,
- decay of animal and plant matter
- burning fossil fuels
- At the surface of the oceans
How is carbon is relised into the atmosphere through decay of animal and plant matter?
Through the decay of animal and plant matter. Fungi and bacteria break down the carbon compounds in dead animals and plants and convert the carbon to CO2 if oxygen is present, or methane if not.
How is carbon released through the burning of fossil fuels?
Through burning fossil fuels such as coal, petroleum products, and natural gas releases carbon that has been stored in the geosphere for millions of years. Burning agrofuels also releases CO2 .
How is carbon released at the surface of the oceans?
At the surface of the oceans where the water becomes warmer, dissolved carbon dioxide is released back into the atmosphere.
Scientists are interested in predicting some of the impacts that increased CO2 in the atmosphere will have:
- Increase in temperature
- Rise in sea level (melting glaciers and sea ice)
- Increased occurrence/intensity of climatic events (hurricanes, snow, rain)
- Species range shifts
What anthropogenic activities affect the Carbon Cycle?
Burning fossil fuels, Deforestation
How does the anthropogenic activity of Burning fossil fuels affect the carbon cycle?
- Releases more CO2 into the atmosphere than the natural
- carbon cycle can manage
- Excess carbon emissions from vehicles
How does the anthropogenic activity of deforestation affect the carbon cycle?
Eliminates the plants that incorporate CO2 into the biosphere (photosynthesis)
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