| A | B |
|---|
| producers | organisms that make their own food from inorganic molecules and energy |
| consumers | oranisms that cannot make their own food |
| decomposers | bacteria and fungi that consume the bodies of dead organisms and other organic wastes |
| trophic level | a layer in the structure of feeding relationships in an ecosystem |
| food chain | a series of different organisms that transfer food between the trophic levels of an ecosystem |
| food web | a network of food chains representing the feeding relationships among the organisms in an ecosystem |
| biological magnification | the increasing concentration of a pollutant in organisms at higher trophic levels in a food web |
| biomass | the total amount of organic matter present in a trophic level |
| ecological pyramid | a diagram that shows the relative amounts of energy in different trophic levels in an ecosystem |
| transpiration | the evaporation of water from the leaves of the plants |
| legume | are plants such as peanuts, beans, and clover that have colonies of nitrogen fixing bacteria in modules in their roots |
| evaporation | the movement of water into the atmosphere as it changes from a liquid to a gas |
