| Question | Answer |
| producer | organism, such as a green plant or alga,
that uses an outside source of energy
like the Sun to create energy-rich food
molecules. |
| consumer | organism that cannot create energy-rich
molecules but obtains its food by eating
other organisms. |
| herbivores | an animal that eats only plants |
| carnivores | animal that eats only other animals or
the remains of other animals; mammals
having large, sharp canine teeth and
strong jaw muscles for eating flesh . |
| omnivores | an animal that eats both plants and animals |
| decomposers | an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances. |
| food chain | a series of events in wich one organism eats another |
| food web | model that shows the complex feeding
relationships among organisms in a
community. |
| energy pyramid | a digram that shows the amount of energy that leaves from one feed level to another in the food web |
| water cycle | the continuos process by wich water moves from earth's surface to the atmosphere and back. |
| evaporation | the process by wich molecules of a liquid absorb energy and change into a gas state |
| condensation | process in which water vapor changes to a
liquid. |
| precipitation | Rain, snow, sleet, or hail |
| nitrogen fixation | the process of changing free nitrogen into a usable form |
| nodules | bumps on the roots of certain plants that house nitrogen fixing bacteria |
| biogeography | the study of the geographical distribution of living things. |
| dispersal | the movement of organisms from one place to another |
| native species | species that have naturally evolved in an area |
| exotic species | species that carried in to a new location by people |
| climate | average weather conditions of an area
over time, including wind, temperature,
and rainfall or other types of
precipitation such as snow or sleet. |
| continental drift | Wegener’s hypothesis that all continents
were once connected in a single large
landmass that broke apart about 200
million years ago and drifted slowly to
their current positions. |
| |
| |
| |
