| A | B |
|---|
| tide | repeated rise and fall in the level of the ocean |
| estuary | body of water where a river meets an ocean |
| current | stream of water that flows like a river through the ocean |
| shore | area where ocean and land meet |
| desalination | removal of salt from sea water |
| jetty | wall of rocks built out into the ocean |
| wave | up and down movement of surface water |
| headland | rocky point along a shore |
| sonar | sound waves that can be used to map the ocean floor |
| submersible | small underwater vehicle |
| tide pool | pool of sea water along a rocky shoreline |
| scuba | self-contained underwater breathinng apparatus |
