Across
- 4. Periodic rising and falling of the ocean's height at a given location.
- 6. Where surface currents converge and surface water sinks.
Down
- 1. Bodies of water that occur when fresh water meets the water of an ocean or inland sea.
- 2. The vertical flow of cold, nutrient-rich water towards the surface.
- 3. Areas of land that are flooded.
- 5. It measures the amount of salts dissolved in water.