Beaches: More Than Sand and Sun, The Secret Life of the Shore

5. The process by which the surface of the earth is worn away by the action of water, glaciers, winds, or waves.
7. A landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or standing water.
8. The line where the land meets the sea or ocean.
11. The plants of a particular region, habitat, or geological period.
12. Relating to or produced by a volcano or volcanoes.
14. The alternate rising and falling of the sea, usually twice in each lunar day at a particular place.
15. The tidal mouth of a large river, where the tide meets the stream.
16. A long, narrow island of sand that runs parallel to the mainland, protecting the coast from the full force of ocean waves.
17. The weather conditions prevailing in an area in general or over a long period.
18. A hard, crystalline mineral composed of silicon and oxygen atoms, a primary component of sand.

1. A relatively flat platform of sand on a beach, deposited by waves and marking the limit of the swash.
2. A mound or ridge of sand or other loose sediment formed by the wind, especially on the sea coast.
3. Pertaining to the shore of a lake, sea, or ocean; another word for the intertidal zone.
4. Produced or brought about by living organisms.
6. Matter that settles to the bottom of a liquid; in geology, rock particles transported by water, wind, or ice.
9. The natural home or environment of an animal, plant, or other organism.
10. A long body of water curling into an arched form and breaking on the shore.
11. The animals of a particular region, habitat, or geological period.
13. A body of water or air moving in a definite direction, especially through a surrounding body of water or air in which there is less movement.
19. A ridge of jagged rock, coral, or sand just above or below the surface of the sea.