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The Ocean Floor

The Ocean Floor. Seeing by SONAR. SO und N avigation A nd R anging A ship sends sound waves to the ocean floor. The sound waves bounce off the floor and back to the ship. The deeper the water, the longer it takes for the sound waves to return.

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The Ocean Floor

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  1. The Ocean Floor

  2. Seeing by SONAR • SOundNavigation And Ranging • A ship sends sound waves to the ocean floor. • The sound waves bounce off the floor and back to the ship. • The deeper the water, the longer it takes for the sound waves to return.

  3. Another way to study the ocean floor is with satellites.

  4. The Ocean Floor

  5. Continental Shelf • Begins at the shoreline and slopes gently toward the open ocean.

  6. Continental Slope • Begins at the edge of the continental shelf and continues down to the flattest part of the ocean floor

  7. Continental Rise • Made of large piles of sediment and found at the base of the continental slope

  8. Can you find the continental Shelf, slope and rise?

  9. Abyssal Plain • Broad flat part of the ocean that is very deep and covered with mud and the remains of decomposing organisms

  10. Mid-Ocean Ridge • Mountain chains that form when tectonic plates pull apart at divergent boundaries

  11. Rift Valley • The valley that forms when tectonic plates separate

  12. Seamounts • Mountains of volcanic material that do not build up enough to break the surface Seamounts

  13. Ocean Trench • Large cracks in the ocean floor that form at convergent boundaries

  14. Can you find all of the following: • Continental Shelf • Continental Slope • Continental Rise • Abyssal Plain 5. Mid-Ocean Ridge 6. Rift valley 7. Seamounts 8. Ocean trench

  15. Life in the Ocean

  16. There are three main groups of ocean life. • PLANKTON are organisms that float or drift freely near the ocean’s surface. • NEKTON are organisms that swim actively throughout the open ocean. • BENTHOS are organisms that live on the ocean floor.

  17. Plankton • Most are microscopic. • Phytoplankton are like plants • Zooplankton are like animals

  18. Nekton • Examples include • Whales • Dolphins • Grouper • Sharks • Sea Lions • Angler Fish

  19. Sharks Off the GA Coast

  20. Atlantic Black Tip

  21. Bonnethead Shark

  22. Hammerhead Shark

  23. Atlantic Sharpnose

  24. Sand Bar Shark

  25. Bull Shark

  26. Benthos • Examples include: • Crabs • Starfish • Worms • Sponges • Lobster

  27. Can you find nekton and benthos?

  28. Can you find nekton and benthos?

  29. Find plankton, nekton, and benthos.

  30. Questions

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