Across
- 3. Separation of large solids.
- 9. Low productivity.
- 11. Having no specific location of discharge, multiple sources.
- 12. Enough light for photosynthesis.
- 14. Removal of nutrients.
- 17. Soil/rock is not holding full amount of water, there are still air pockets.
- 18. Contain 20% of the world’s available surface water.
Down
- 1. All available spaces are filled with water.
- 2. Along coastlines saltwater can move into aquifers if there are too many wells drawing water from the ground.
- 4. Bottom of ocean.
- 5. Removing ground water faster than it is being replaced can cause the land on top of the aquifer to sink or buckle.
- 6. High productivity.
- 7. Biological treatment.
- 8. Caused by human activities such as fertilizer use and sewage contamination.
- 10. Cover 71% of Earth’s surface.
- 13. An imaginary line dividing the saturated zone from the unsaturated zone.
- 15. Not enough light for photosynthesis.
- 16. Discharge pollution from a specific location.