Earth's Ecosystem

3. Overload _______ is a serious and growing local, regional, and global environmental problem that has attracted little attention.
8. The major reservoir for nitrogen is the _______.
9. Socolow Princeton University physicist ________ calls for countries around the world to work out some type of nitrogen management agreement.
10. Ammonia not taken up by plants may undergo ______.
12. ______ can change values of the variables in their computer models to project possible changes in environmental conditions.
15. ____ is converted to sulfur dioxide, some of which in turn is converted to sulfur trioxide gas (SO3) and to tiny droplets of sulfuric acid (H2SO4).
16. Evaporation and subsequent _______ act as a natural distillation process that removes impurities dissolved in water.
18. As ________ move through the biogeochemical cycles, they may accumulate in one portion of the cycle and remain there for different lengths of time.
19. runoff Most precipitation falling on terrestrial ecosystems becomes ________.

1. Clearing _____ can also alter weather patterns by reducing transpiration.
2. Some precipitation sinks through soil and permeable rock formations to underground layers of rock, sand, and gravel called _____
4. Cycle We alter the _______ in three major ways.
5. Some precipitation is converted to ice that is stored in ______
6. _____ provide the computer technology for storing, organizing, and analyzing complex data collected over broad geographic areas.
7. respiration The cells in oxygen-consuming producers, consumers, and decomposers then carry out ________.
11. ______ is the basic building blocks of the carbohydrates.
13. cycle _______ can be viewed as a cycle of natural renewal of water quality.
14. Cycle Sulfur circulates through the biosphere in the ________.
15. _________ release the carbon stored in the bodies of dead organisms on land back into the air as CO2.
17. Cycle ________ is slow compared to the water, carbon, and nitrogen cycles.