| A | B |
| POPULATION | A group of the same species living together in one area. |
| COMMUNITY | A group of interacting populations made up of different species. |
| ECOSYSTEM | All the different organisms living in certain areas or environments. |
| BIOTIC FACTORS | Living parts of an ecosystem. |
| ABIOTIC FACTORS | Non-living parts of an ecosystem. |
| ORGANISM | One individual living thing. |
| SPECIES | Group of organisms able to produce fertil offspring. |
| ENVIRONMENTAL SCIENCE | The study of how humans interact with the environment. |
| ENVIRONMENT | Everything around us |
| NATURAL RESOURCE | Any natural substance that living things can use |
| NONRENEWABLE RESOURCES | Natural resources that cannot be replaced |
| RENEWABLE RESOURCES | Resources that are constantly replinishing themselves even as they are being used |
| RESOURCE DEPLETION | A resource is depleted when a large part of it has been used up. |
| POLLUTION | The introduction of harmful levels of chemicals or waste materials into the environment. |
| EXTINCTION | The last living individual of a species has died and the species is gone forever. |
| BIOSPHERE | The thin layer of life around the earth. |
| DEVELOPING COUNTRIES | Less industrialized countries with much lower average incomes. |
| POPULATION CRISIS | When population increases faster than the natural resources to sustain the population. |
| CONSUMPTION CRISIS | When humans use up, waste, or pollute natural resources faster than they can be replenished. |
| SUSTAINABLE WORLD | A world in which human populations can continue to exist indefinitely with a high standard of living and health. |
| PURE SCIENCE | Seeks answers about how the natural world works. |
| APPLIED SCIENCE | Uses the information provided by pure science to solve problems |
| ECOLOGY | The study of how living things interact with each other and their nonliving environments. |
| HYPOTHESIS | A testable explanation fro an observation. |
| EXPERIMENT | Used to find answers to questions, a hypothesis is tested under controlled conditions. |
| BIOTIC FACTORS | The living parts of an ecosystem, i.e. animals , plandts, and microorganisms |
| ABIOTIC FACTORS | Nonliving parts of the ecosystem, i.e. temperature, humidity, sunlight, soil type, and mineral nutrients |
| ORGANISM | One individual living thing |
| SPECIES | A group of orgranisms that are able to produce fertile offspring and share common genes. they resemble each other. |
| POPULATION | A group of individuals of the same species living in a particular place |
| COMMUNITY | A group of interacting popluations of different species. |
| NICHE | Living and nonliving relationships with the environment |
| HABITAT | An actual place where an organism lives |