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Chapter 3 APES "Carbon Cycles"
Terms in this set (16)
What is carbon?
It is in a essential elements in living systems, providing the chemical framework to for the molecules that make up living organisms, carbohydrates proteins fats and nucleic acid's. Humans our carbon-based life forms
What happens to carbon on earth?
The same carbon atoms are used repeatedly on earth. They continuously cycle between the earth and the atmosphere
What are the major reservoirs of carbon?
The atmosphere is one of earths reservoirs of carbon in the form of carbon dioxide
How much carbon is in the atmosphere?
Carbon dioxide gas mix up a small portion of the troposphere, 0.038%, and this greenhouse gas is a natural thermostat for earths surface temperature
How is carbon dioxide regulated in the atmosphere?
Without anthropogenesis inputs, terrestrial producers and consumers regulate the concentration of atmospheric carbon dioxide through photosynthesis and respiration
How is gross primary productivity related to the carbon cycle?
GPP is the rate at which and ecosystems producers capture and store a given amount of chemical energy as biomass in a given period of time
How is net primary productivity related to the carbon cycle?
NPP is the rate at which all the plants In an ecosystem produce net useful energy; equal to the difference between the energy produced through photosynthesis and energy used for cellular respiration
What is photosynthesis?
It's occurs within the chloroplasts of green plants carbon dioxide and water are the reactants, and glucose and oxygen are the products
What is cellular respiration?
It's refers to the biochemical pathway by which the chemical energy of glucose molecules mostly is released and partially captured in the form of ATP. It is the reverse reaction of photosynthesis
What is another place carbon is stored?
Oceanic sediments are the largest reservoir of earths carbon. Like oxygen carbon dioxide is also dissolved in aquatic ecosystems to support life processes. Much dissolved carbon dioxide is converted to bicarbonate and carbonate ions. These ions typically combine with calcium to form calcium carbonate, which makes shells of marine organisms and sediments that overtime form limestone rock
Where else is carbon stored?
Carbon is stored in the biosphere of freshwater systems, soil, and the biomass of living organisms. Much of our carbon is stored in fossil fuels that formed from the deposition of organisms remains that were exposed to intense heat and pressure over millions of years ago
What happens to the carbon stored in fossil fuels?
Carbon stored in fossil fuels is not released and cycled as carbon dioxide in the atmosphere until it is extracted and burned for energy purposes
Fossil fuels and the carbon cycle.
Fossil fuels such as coal and petroleum are remnants of formerly living plants and animals. Both have high concentrations of carbon. Burning fossil fuels releases carbon into the atmosphere
What's our carbon sinks?
They include forest, oceans, and carbon deposits. Carbon sinks remove carbon from the atmosphere
What are some ways humans impact the carbon cycle?
Forest and brush removal has left less vegetation to absorb carbon dioxide through photosynthesis
What are other ways human impact the carbon cycle?
Burning fossil fuels and wood produces carbon dioxide, greenhouse gas, that flows into the troposphere. Trapping of CO2 in the atmosphere enhances natural greenhouse effect and contributes to climate changes that are disrupting global food production, wildlife habitats, rising sea level, and melting ice caps
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