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History of Ocean Floor research

History of Ocean Floor research. Ms. Bridgeland 6 th Grade. Why have people been interested in using the ocean since ancient times?. 3 Major R easons. 1) Ocean provides FOOD 2) Serves as a route for TRADE 3) Is a way to TRAVEL Travel to have accurate maps

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History of Ocean Floor research

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  1. History of Ocean Floor research Ms. Bridgeland 6th Grade

  2. Why have people been interested in using the ocean since ancient times?

  3. 3 Major Reasons • 1) Ocean provides FOOD • 2) Serves as a route for TRADE • 3) Is a way to TRAVEL • Travel to have accurate maps • Fame for scientific discoveries

  4. James Cook led first expedition for OCEAN RESEARCH in the late 1700s

  5. The Challenger expedition in 1872 *inspired Charles Darwin to study marine biology  informed his Theory of Evolution later *led to discovery of organisms, data on temperature, currents, water chemistry, and ocean floor deposits

  6. When did we actually begin studying the ocean floor?

  7. Exploring the Ocean Floor • No helpful ocean floor research until 1925 • WHY did it take so long to explore the ocean floor?

  8. The ocean floor is more than twice as deep as the Grand Canyon

  9. 1925: Big breakthrough --SONAR

  10. Conditions are very HARSH • There is NO sunlight at this depth • The water is very COLD • Deep water exerts tremendous PRESSURE

  11. SONAR: Sound navigation and ranging • a system that uses sound waves to calculate the distance to an object • Pulses bounce off the ocean floor and return to the ship

  12. When was SCUBA diving developed?

  13. S.C.U.B.A. • 1943: self-contained underwater breathing apparatus • A tank containing compressed air that is strapped to a diver’s back and connected by a tube to a mouthpiece • Only enables divers to explore to a depth of 40 meters

  14. 1960 -Submersibles • “Trieste” • Thick metal could withstand pressure help them safely reach lower depths • Moved 3 ft per second and reached the ocean floor in about 4 hours

  15. What is the difference between a submarine and a submersible?

  16. Modern Day Submersible – Alvin was used to study the Titanic wreckage in 1986

  17. 1986 –Remote Underwater Manipulator • A device like a small car controlled by a computer that could collect samples, take photos, and map the ocean floor without a crew

  18. Remote Underwater Manipulator

  19. 2003: Deep Flight Aviator • A new type of submersible was launched in San Francisco Bay. • Moved faster and more easily than others • Passengers could see more

  20. Deep Flight Aviator 2003“underwater airplane”

  21. Deep Flight Aviator 2003

  22. Exploring Titanic Wreckage 2004 • https://www.youtube.com/watch?v=6Z7REEnwKOQ

  23. Modern technology oceanographer Sylvia Earle uses: • https://www.youtube.com/watch?v=tRd612BrDKU

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