| A | B |
|---|
| biosphere | the thin volume of Earth and its atmosphere that supports life |
| community | all the interacting organisms living in an area. |
| ecology | the study of interactions between organisms and the living and non-living parts of the environment |
| ecosystem | all of the organisms and non-living material found in a particular place. |
| greenhouse effect | the mechanism that insulates the Earth from the deep freeze of space. |
| population | all the members of a species that live in one place at one time. |
| ozone layer | The layer of the atmosphere that protects the living organisms on Earth from the sun. |
| chlorofluorocarbon | a chemical propellant that destroys ozone molecules |
| extinction | when a species of organism disappears from the Earth forever. |
| ecological model | a way that Ecologists make complex systems simpler to study. Can be mathematical, verbal or written. |
