Across
- 4. A harmful effect of algae over production
- 6. The watershed we live on!
- 7. the separation of an electrical charge
- 9. when large amounts of groundwater have been withdrawn from certain types of rocks
- 11. the way similar materials stick together
- 12. less than one percent of one percent of water is drinkable and available
Down
- 1. overusing a well so that instead of fresh water it produces salt water
- 2. The cycle of nitrogen
- 3. A surface water cannot go through
- 5. Zones with reduced oxygen
- 8. how hot something can be
- 10. a fishing net that’s been lost or abandoned in the ocean