Oceans

2. the current formed by water returning to the ocean beneath breakers on the beach
7. the vertical difference between the trough and crest of a wave
8. the boundary between deep, cold water and warmer surface water
9. the measure of the total amount of dissolved salts in seawater
11. a tidal flat forest with saltwater tolerant trees
12. a muddy or marshy area covered and uncovered by the rise and fall of the tide
14. water that is somewhat salty but not as salty as seawater
17. a wave-caused current that flows parallel to a shoreline
18. a periodic rise and fall of the level of the ocean surface caused by the gravity between earth and the moon
19. a spit or sand bar which extends all the way across the mouth of a bay

1. plankton that are able to do photosynthesis
3. the horizontal distance from crest to crest or trough to trough of a wave
4. the shallowest benthic environment located between the water boundaries of high and low tides
5. a long narrow island that runs parallel to a shoreline
6. the high point of a wave
10. the farming of aquatic life in the ocean
13. a central body of water at an atoll separated from the ocean by coral islands
15. the great body of seawater that covers a majority of earth's surface
16. the amount of time it takes for one wave to pass by a location
19. a wave that is collapsing as it enters shallow water