Across
- 5. An opening in the sea floor from which heated water rises and mixes with the ocean water above.
- 10. Microscopic floating organisms that live in water and, like plants, convert sunlight and carbon dioxide into food.
- 12. A narrow stream of water that breaks through sandbars and rapidly back into deeper water.
- 13. A property of matter representing the mass per unit volume.
- 16. The flat or gently sloping land that lies submerged around the edges of a continent and that extends from the shoreline to the continental slope.
- 20. The portion of animals that are caught in a net and then thrown away as unwanted.
- 21. A system that uses underwater sound waves to measure distance and locate objects.
Down
- 1. A shoreline area where fresh water from a river mixes with salt water from the ocean.
- 2. A wet, swampy area that is often flooded with water.
- 3. The overall direction and movement of water as waves strike the shore at an angle.
- 4. A disturbance of wind patterns and ocean currents in the Pacific Ocean that causes temporary climate changes in many parts of the world.
- 5. The natural environment in which a living thing gets all that it needs to live.
- 6. The movement of water from the surface to greater depths
- 7. The periodic rising and falling of the water level of the ocean due to the gravitational pulls of the Moon and the Sun.
- 8. A tide of small range occurring during the first- and third- quarter phases of the Moon.
- 9. A tide of large range occurring during the new and full moons, resulting in an extra-high tidal bulge and an extra-low tidal dip.
- 11. The vertical movement of deep water up to the surface.
- 14. The narrow ocean margin between the high-tide mark and the low-tide mark.
- 15. A large community of kelp, a type of seaweed that can attach to the ocean floor.
- 17. A mass of moving ocean water.
- 18. The difference in height between high tide and low tide.
- 19. The measure of the amount of dissolved salt contained in water.