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Ch22 Biology Study N
| Question | Answer |
|---|---|
| Producer | An autotrophic organism that captures energy to make organic molecules. |
| Trophic level | A feeding level in an ecosystem |
| Decomposer | An organism that obtains nutrients from dead plants and animals |
| Ecosystem | All the biotic and abiotic components of an environment |
| Consumer | A heterotroph that obtains energy (Primary- Cows eat grass) (Secondary- Humans eat cows) |
| Biomass | The dry weight of organic material in an ecosystem |
| Transpiration | The evaporation of water through stomata |
| Food Web | The interconnected food chains in an ecosystem |
| Food Chain | A pathway beginning with producers along which energy is transferred form trophic level to trophic level |
| Habitat | The physical area in which an organism lives |
| Biotic | A living component of an ecosystem |
| Abiotic | Any non-living component of an ecosystem |
| Biogeochemical Cycle | The process by which materials necessary for organisms are circulated through the environment |
| Water Cycle | The movement of water between the ground, the atmosphere, and bodies of water |
| Nitrogen Cycle | The path way that nitrogen follows within an ecosystem |
| Carbon Cycle | The process in which carbon is cycled through the bio sphere |
| Nitrogen gas makes up ______ % of of the Earth;s atmosphere. | 79% |
| When an organism dies how is the nitrogen in the body released? | It is released by decomposers |
| How do plants release water into the atmosphere? | Through transpiration |
| The source of energy determines its _____ _____. | Tropic level |
| What can change an entire ecosystem? | A change in the number of predators in a good web |
| Omnivores eat ______ and consumers eat _____ and ______ | Produces/Plants and animals |
| Decomposers | break down dead organisms |
| primary producers | Are organisms that manufacture organic nutrients for an ecosystem |
| Photosynthetic algae are | producers |
| Decomposers receive energy form | every type of organism |
| A forest ecosystem is self-supporting because.... | No additional energy source needs to be added to the system from the outside. |
| Each energy level transfer only about ___% of its energy to the next level | 10% |
| The low rate of energy transfer between trophic levels explains.... | why ecosystems rarely contain more than 5 levels |
| The number of tropic levels in an ecological pyramid is limited by | the amount of energy that is lost ate each trophic level |
| Amount of usable energy ______ from one trophic level to the next higher. | decreases |
| Animals that feed on plants are in what part of the ecological pyramid? | 1st and 2nd |
| What is nitrogen fixation | The process by which gaseous nitrogen in the air is converted to ammonia |
| Nitrogen is a component of | Proteins |
| Coal, oil, natural gas are fossil fuels, formed that | are formed from decayed plants and release carbon dioxide when formed |
| Humans are affecting the carbon cycle by | Burning fossil fuels, destroying vegetation that absorbs CO2 and using electrical labor-saving devices. |
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adlambert
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