| A | B |
|---|
| _______________ is the major ingredient of all organic molecules | Carbon |
| The main abiotic resevoir of carbon | atmosphere |
| Abiotic resevoir of carbon composed of the remains of long-dead organisms | fossil fuels |
| Two biological processes most important for the cycling of carbon | Photosynthesis and Cellular Respiration |
| Type of organism that consumes the dead remains of other organisms | detritivore |
| This process, carried out by animals and plants, returns carbon to atmosphere as carbon dioxide | cellular respiration |
| This process, carried out by plants, removes carbon dioxide from the atmosphere | photosynthesis |
| This process, carried out by humans, has led to excess carbon dioxide in the atmosphere | burning of fossil fuels |
| This change in climate is linked to the increase of carbon dioxide in the atmosphere due to human activity | global warming |
| In addition to the atmosphere and fossil fuels, what are two additional abiotic reservoirs for carbon? | water and sedimentary rock |
| How is carbon returned to the food chain? | Taken up by plants in the process of photosynthesis and eaten by primary consumers |
| True or False: special bacteria are necessary to make the carbon in the air available to plants | False! It's only nitrogen that requires "fixation" before plants can use it |
| This process "fixes" atmospheric CO2 into a form that plants and animals can use | Photosynthesis |
