Across
- 2. Fossil Fuels contain small amount of Nitrogen and _______
- 5. Oxygen is returned to atmosphere via this one major process
- 6. life forms that cannot tolerate high amount of dissolved salts in saline water
- 8. Endoskeleton and exoskeleton of various animals are made up of ________ salts
Down
- 1. Diamond have carbon in _________ form
- 3. It converts Nitrogen into oxides of nitrogen
- 4. Part of many molecules essential to life like nucleic acids
- 7. Absorbs harmful UV radiation of the sun