| A | B |
|---|
| abiotic factor | nonliving part of an ecosystem |
| biotic factor | living part of an ecosystem |
| carniovre | consumer that eats only animals |
| condensation | gas changes into a liquid |
| consumer | obtains energy by feeding on other organisms |
| decomposer | breaks down wastes and dead organisms |
| ecology | The study of how living things interact with each other and their environment. |
| ecosystem | All the living and nonliving things that interact in an area. |
| energy pyramid | A diagram that shows the amount of energy that moves from one feeding level to another. |
| evaporation | liquid absorbs energy and changes to a gas |
| food chain | series of events in which one organism eats another |
| food web | overlapping food chains |
| groundwater | water stored in underground layers of soil and rock |
| habitat | place where an organism lives and that provides the things it needs |
| herbivore | consumer that eats only plants |
| omnivore | consumer that east plants and animals |
| host | The organism that a parasite lives in or on. |
| niche | An organism's particular role in an ecosystem, or how it makes its living. |
| nitrogen fixation | The process of changing free nitrogen gas into a usable form |
| nodules | bumps on the roots of certain plants that house nitrogen-fixing bacteria. |
| parasite | The organism that benefits by living on or in a host. |
| parasitism | A relationship in which one organism lives on or inside another and harms it. |
| photosynthesis | The process in which organisms use water along with sunlight and carbon dioxide to make food. |
| predation | An interaction in which one organism kills and eats another. |
| prey | An organism that is killed in predation. |
| producer | An organism that can make its own food. |
| scavenger | A carnivore that feeds on the bodies of dead organisms |
| water cycle | The continuous process by which water moves from Earth's surface to the atmosphere and back. |
