Across
- 3. the cycle of processes by which water circulates between the earths oceans
- 4. a colorless, orderless, highly flammable gas, the chemical element of atomic number 1
- 6. water that collects on the surface of the ground
- 8. the chemical element of atomic number 15, a poisonous, combustible nonmetal
- 13. the exhalation of water vapor through the stomata
- 15. the process by which bacteria in soil
- 16. the chemical element of atomic number 7, a corless, odorless unreactive
- 17. a colorless, odorless reactie gas, the chemical element of atomic number 8
Down
- 1. the loss or removal of nitrogen or compounds
- 2. describes how carbon moves between the atmosphere, soils, living creatures
- 5. when anything solid turns into a gas without first becoming liquid
- 7. water held underground in the soil or in pores
- 9. the process of turning from liquid into vapor
- 10. water which collects as droplets on a cold surface when humid air
- 11. the chemical element of atomic number 6, a nonmetal which has two main forms
- 12. the series of processes by which nitrogen and its compounds are interconvereted
- 14. the action or process of precipitating a substance
