Across
- 5. refers to how clearly objects can be seen or how far one can see
- 6. a process where water bodies become enriched with nutrients
- 7. is the outermost or uppermost layer of an object or space
- 8. common constituent and an essential element for plant life
Down
- 1. a measure of how clear or cloudy a liquid is
- 2. the process where natural forces and gravity wear away and transport soil, rock, and other materials
- 3. a substance that provides nourishment essential for growth and the maintenance of life
- 4. a layer of gases that surrounds Earth, making life possible