| A | B |
|---|
| Environmental Science | It is the study of how humans interact with the environment. |
| Environment | It is everything that surrounds us. |
| Natural Resource | It is any natural substance that living things use. |
| Nonrenewable Resources | They are resources that cannot be replaced. |
| Renewable Resources | They are resources that are continually being replaced. |
| Pollution | Pollution is the poisoning our air, water, or soil. |
| Extinction | It is when the last individual member of a species has died and the species is gone forever. |
| Biosphere | It is the thin layer of life around the Earth. |
| Developed Countries | The highly industrialized countries, whose citizens have high average incomes. |
| Developing Countries | Less industrialized countries that have citizens with a much lower average income. |
| Population Crisis | It is when the number of people is growing too quickly for the Earth to support. |
| Consumption Crisis | It is when the people are using up,, wasting, or polluting natural resources faster than they can be renewed, replaced, or cleaned up. |
| Predation | It is when one organism kills and eats another |
| Competition | It is when a relationship between species in which they attempt to use the same limited resource. |
| Parasites | They are organisms that live in or on another organism and feed on it without immediately killing it. |
| Mutualism | It is a cooperative partnership between two species. |
| Coevolution | When two or more species evolve in respoonse to each other. |
| Commensalism | It is a relationship in which one species benefits and the other is neither harmed nor helped. |
| Producer | It is an organism that makes its own food. |
| Consumers | It is when organsims get their energy by eating other organsims. |
| Celluar Respiration | It is the process of breaking down food to yield energy. |
| Food Chain | It is a sequence in which energy is transferred from one organism to the next as each organism eats another. |
| Trophic Level | Each step in the transfer of energy through an ecosystem. |
| Water Cycle | It is the process in which water moves between the atmosphere and the Earth. |
| Climax Community | The final, stable community that forms if the land is left undisturbed. |
