| A | B |
|---|
| environmental science | study of how humans interact with environment |
| environment | everything that surrounds us |
| natural resource | any natural substance that living things use |
| environmental problems | resource depletion, pollution, extinction |
| nonrenewable resource | resources that cannot be replaced |
| renewable resource | resource that is continually replaced |
| secchi disk | instrument used to measure the clarity of lake water |
| pollution | introduction of harmful chemicals or wate material into the environment |
| extinction | disappearance of species from Earth |
| biosphere | thin layer of life around the Earth |
| developed country | US, Canada, Japan, Australia, New Zealand, and western Europe |
| developing country | less industrialized country where citizens have low average incomes |
| population crisis | human populations growing so rapidly the region cannot support them |
| consumption crisis | people use up, waste, or pollute resources faster than they can be renewed |
| sustainable world | world in which the human population can continue indefinitely with a high standard of living and health |
| pure science | seeks answers to questions about how the natural world works |
| applied science | uses the information provided by pure science to solve problems |
| ecology | study how living things interact with each other and their nonliving environment |
| science | something you do |
| scientific method | way of getting answers to questions about the natural world around us |
| hypothesis | testable explanation for an observation |
| experiment | testing a hypothesis under controlled conditions |
