Environmental Science

3. heterogeneity or the range of organisms in a community
4. is the variety present at the level of the gene
7. the removal of soils from an area due to wind or water, and is the biggest contributor to soil degradation.
8. put directly into the air by human activities
9. Heavy machinery that continuously moves over the soil compacts the soil decreasing the air content of the soil and the ability of animals (such as worms), water, and roots to move
10. formed from the decomposition of organic compounds
11. the many new technologies and advances in the agricultural industry
12. the ozone layer (which accounts for 90% of Earth's ozone) can be found.

1. The primary cause leading to a lost of biodiversity
2. mixture of air pollutants that typically produce a hazy appearance
5. is the process of fusing two hydrogen atoms together to produce one helium atom
6. a colorless gas that is nothing like atmospheric ozone that is in the stratosphere surrounding the Earth and protecting humans from the harmful UV radiation