Across
- 2. contamination of water bodies, usually as a result of human activities
- 3. how acids or basic water is
- 4. The study of how the major bodies of water have shifted, expanded and changed land masses
- 7. The nitrite ion has the chemical formula NO2
- 9. Possible sources are animal waste and cleaning products
Down
- 1. biological characteristics of water based on the standards of its usage
- 3. possible sources are soap personal products and paint
- 5. how much dirt is suspended in water
- 6. oxygen how mush oxygen is in water
- 8. the part of the water cycle that flows over land as surface water