Across
- 1. the land that water flows across or through on its way to a stream, lake, wetland, or other body of water.
- 4. the shape of the land determined by elevation relief, and landforms.
- 6. relating to or resulting from living things, especially in their ecological matters.
- 7. streams or rivers that flow into a larger river.
Down
- 2. physical rather than biological; not derived from living organisms.
- 3. the top edge of the ridge of a mountain.
- 5. areas of higher elevations, such as ridgelines and mountains that separate watersheds.
- 8. water that flows over the ground surface rather than soaking into the ground.