Across
- 3. When rainwater flows off surfaces, often collecting pollution.
- 6. A region where all water drains to the same place.
- 8. A remote sensing device that orbits Earth and collects data.
Down
- 1. The cloudiness or haziness of water due to particles.
- 2. Short for the oxygen in water that aquatic life needs.
- 4. Technology that collects data from a distance, like by satellite.
- 5. Measures how acidic or basic the water is.
- 7. An overgrowth of algae from excess nutrients like nitrogen.