| A | B |
|---|
| environmental science | how human interact with the environment |
| natural resource | any natural substance that living things can use |
| biosphere | thin layer around the Earth |
| consumption crisis | people using up, wasting,polluting natural resources faster than they can be replaced |
| natural science | seeks to answer questions about how the natural world works |
| hypothesis | scientist's prediction of what the correct answer will be |
| biotic factors | living parts of an ecosystem |
| population | group of individuals of the same species living in a particualr place |
| competition | relationship between species in which they attempt to use the same limited space |
| coevolution | when two or more species evolve in response to each other |
| cellular respiration | process of breaking down food to yield energy |
| trophic level | each step in the transfer of energy through an ecosystem |
| climax community | final, stable community that forms if the land is left undisturbed |
| pioneers | first organisms to colonize any newly available area |
| developed countries | highly industrialized countries with high average incomes |
| ecosystem | all the different things living in a certain area, along with physical environment |
| parasitism | relationship between the parasite and its host |
| precipitation | rain, sleet, or snow |
| ecology | how living things interact with each other |
| niche | organism's way of life |
| commenalism | relationship in which one species benefits and the other is neither harmed nor helped |
| water cycle | water moves from place to place in this cycle |
| succession | regular pattern of changes over time in the types of species in a community |
| habitat | actual place an organism lives |
| substainable world | world in which human populations can continue to exist indefinitely with a high standard of living and health |
