Across
- 2. cycle the cycle of processes by which water circulates between earth's oceans
- 4. a mineral that makes up 1% of a person's total body weight
- 5. the action or process of precipitating a substance from a solution.
- 7. a colorless, odorless, reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air
- 8. the chemical element of atomic number 7
- 9. cycle the cycle of thermonuclear reactions believed to occur in stars
- 10. a colorless, odorless, highly flammable gas, the chemical element of atomic number 1.
Down
- 1. non-metallic chemical element in group 14 (IVa) of the periodic table
- 3. the process of turning liquid from liquid into vapor
- 6. cycle the series of processes by which nitrogen and its compounds are interconverted in the environment