| A | B |
| Gaia Hypothesis | compare earth/living body |
| biosphere | 3 structural zones of earth |
| lithosphere | land |
| hydrosphere | water |
| atmosphere | air |
| biotic | living compmnent |
| abiotic | non living component |
| population | indivivuals/speciec/area/time |
| community | population/ALL organisms/area |
| ecosystem | community/physical/chemical environment |
| atmosphere | air which encircles earth |
| zones of atmosphere | tropospere/stratosphere/meso |
| stratosphere | 50km/ozone layer |
| U.V.radiation | elect/mag causes skinburn |
| ozone | helps screen out U.V.R. |
| mesosphere | above atmosphere |
| ozone hole | caused by CFC's inc radiation |
| biochemical cycles | nutrients-organism-environ |
| photosynthesis | sun energy/sugar CO2+H2O |
| chemosynthesis | chemicals-glucose |
| hydrological cycle | H2)-earth/atmosph/earth |
| cellular resp | chemicals/fuel cell activity |
| transpiration | loss water from plants |
| nitrogen fixation | NO2-NO3=NO4 used by plants |
| denitrifying bacteria | nitrates/nitrites-NO2=NO |
| anaerobic bact | grow best in low O2 |