| A | B |
|---|
| biotic | features of the environment that are alive |
| abiotic | features of the environment that are nonliving |
| atmosphere | air that surrounds Earth |
| Soil | mixture of minerals, rock, dead organisms, water and air |
| humus | decaying matter in soil |
| climate | area's average weather conditions |
| wind | air currents caused by temperature differences |
| elevation | distance above sea level |
| latitude | imaginary horizontal lines |
| photosynthesis | process in which plants use sunlight to make Oxygen and energy rich molecules |
| respiration | process in which cells use O to release energy |
| chlorophyll | green pigment found in most plants and algae |
