chapter 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| food chain | series of steps in which organisms transfer energy by eating or being eaten.
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| phytoplankton | mixture of floating algae
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| food web | network of complex interactions formed by feeding relationships among the various organisms in an ecosystem
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| zooplankton | small free floating animals that form part of plankton
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| trophic level | each step in a food chain or food web
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| ecological pyramid | an illustration of the reduction in energy as you move through each feeding (trophic) level in an ecosystem.
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| biomass | is fuel that is developed from organic materials, a renewable and sustainable source of energy used to create electricity or other forms of power.
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| biogeochemical cycle | a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.
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| nutrient | anything that nourishes a living being.
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| nitrogen fixation | some bacteria can convert N2 into ammonia by the process termed nitrogen fixation; these bacteria are either free-living or form symbiotic associations with plants or other organisms
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| denitrification | a microbially facilitated process of nitrate reduction (performed by a large group of heterotrophic facultative anaerobic bacteria) that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products
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| limting nutrient | the plant's growth is often directly related to the amount of whichever limiting nutrient (nitrogen or phosphorus) that it is are able to get. Generally speaking, phosphorus is a limiting nutrient in freshwater systems and nitrogen is a limiting nutrient
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| autotroph | any organism capable of self-nourishment by using inorganic materials as a source of nutrients
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| primary producer | any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter.
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| photosynthesis | the complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates
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| chemosynthisis | the synthesis of organic compounds within an organism, with chemical reactions providing the energy source.
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| heterotroph | an organism requiring organic compounds for its principal source of food.
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| consumer | a person or thing that consumes.
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| carnivor | an animal that eats flesh.
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| herbivore | plant eating animal
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| scavenger | an animal or other organism that feeds on dead organic matter.
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| omniver | eats a variety of foods
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| decomposer | an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances.
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| detrivore | an organism that uses organic waste as a food source, as certain insects.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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