Across
- 2. waves that form into foam against the shore
- 4. water level at its highest
- 7. currents that are on the surface of the water
- 11. higher and lower tides
- 13. currents that start in the ploes and move to the tropics
- 18. water level at its lowest
- 19. the rise and fall of water
Down
- 1. where river and ocean water meet
- 2. pieces of land surrounded by water that protect the mainland
- 3. shoreline made of sand
- 5. currents that come from the tropics and move to the poles
- 6. the process of waves eroding the beach
- 8. smallest range of high and low tides
- 9. repeated movements of water
- 10. water filled spaces between an island and the mainland
- 12. giant ocean wave
- 14. currents that move parallel to the shore
- 15. continual move of water in a circular motion
- 16. highest part of a wave
- 17. lowest part of a wave
