| A | B |
|---|
| scientific method | procedures used to solve problems and answer questions |
| heterotroph | another name for consumer |
| experiment | used to test a hypothesis |
| variable | something in an experiment that can change |
| control | standard to which the outcome of a test is compared |
| theory | explanation of things or events based on scientific knowledge resulting from many observations and experiments |
| law | statement about how things work in nature that seems to be true consistently |
| constant | a factor that does not change when other variables change |
| biotic | living, once-living, can be dead |
| abiotic | nonliving |
| organism | a complete, individual living thing |
| population | group of organisms living in the same place at the same time |
| community | all of the populations living in the same place at the same time |
| ecosystem | all of the communities living in the same place at the same time and the nonliving features |
| biosphere | the part of Earth where life exists |
| habitat | where an organism lives (address) |
| niche | the role of an organism in its environment (job) |
| producer | organism that makes its own food, usually with sunlight, carbon dioxide, and water |
| autotroph | another name for producer |
| consumer | organism that cannot make its own food; must take in nutrients |
| hypothesis | prediction that can be tested; educated guess |
