1. Field of science that studies phenomena related to agriculture?

2. Soil horizon normally found below the O horizon and above the B horizon?

3. A body of air whose temperature and humidity characteristics remain relatively constant?

4. The exhaust from burning fuels in automobiles, homes, and industries is a major source of pollution in the air?

5. Weight of the atmosphere on a surface?

6. Relative stability of parcels of air relative to the atmosphere that surrounds them?

7. A ring shaped reef composed largely of coral?

8. Smallest unit of an element that still maintains its chemical/physical characteristics?

9. Energy released from an atomic nucleus at the expense of its mass?

10. Combined number of an atom's protons and neutrons?