| A | B |
|---|
| ecosystem | all the living and nonliving things that interact in an area |
| habitat | place where an organism lives and that provides the things the organism needs |
| biotic factors | living parts of an ecosystem |
| abiotic factors | nonliving parts of an ecosystem |
| photosynthesis | process which plants use water, sunlight and carbon dioxide to make food |
| population | all members of one species in a particular area |
| species | a group of organisms that are physically similar and can reproduce fertile offspring |
| community | all the different populations that live together in an area |
| organism | living thing |
| water | abiotic factor that all organisms need |
| soil | abiotic factor, mixture of rock, nutrients, air, water, and decaying matter |
| oxygen | abiotic factor needed for burning food for energy |
| temperature | abiotic factor that determines what lives in an ecosystem |
| climate | average temperature and rainfall in an area that determines what can live there |
| order of organisms through ecosystem | organism-species-population-community-ecosystem |
| ecology | science of how organisms interact with each other |
| stimulus | change in the environment that causes an organism to react or do something |
| response | organisms behavior change due to a change in the surroundings |
| plant growing toward water | hydrotropism |
| phototropism | plant growing toward light |
| geotropism | roots of a plant growing downward and stem up as a reaction to gravity |
| thigomotropism | reaction to touch like the Venus Fly Trap |
| decomposer | organism such as bacteria and fungi that break down dead organisms and return matter to the earth |
