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EARTH’S OCEAN

EARTH’S OCEAN. ACTIVITY: “HOLD YOUR BREATH”. HAND OUT QUESTIONS AND ANSWERS. Oceanography: The study and exploration of the world’s ocean. Oceans of Earth. Fathom: A unit of measurement of the ocean depth. One fathom is 6 feet (1.83 meters). OCEAN REVIEW.

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EARTH’S OCEAN

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  1. EARTH’S OCEAN

  2. ACTIVITY: “HOLD YOUR BREATH” • HAND OUT • QUESTIONS AND ANSWERS

  3. Oceanography: The study and exploration of the world’s ocean.

  4. Oceans of Earth • Fathom: A unit of measurement of the ocean depth. One fathom is 6 feet (1.83 meters).

  5. OCEAN REVIEW • Continuous body of water, covers the majority of Earth • Integral part of the water cycle (evaporation) • Consist of several zones • Temperature • Pressure • Sunlight

  6. Ocean Review (cont.) • Salinity fairly constant • Photosynthesis productivity greatest in sunlight zones • Currents recycle nutrients, minerals and gases • Terrestrial and aquatic food webs are interconnected and affect levels of nutrients.

  7. REVIEWING BOUYANCY • Buoyancy: is the ability to float • Buoyant Force: is force that acts in the upward direction against gravity (makes objects feel lighter). • An object sinks if its weight is greater than the buoyant force. • If the weight of the object is equal to the buoyant force it floats.

  8. EXPLORING EARTH’S OCEAN • Equipment used has changed over time. http://www.coolclassroom.org/cool_projects/lessons/miniunits/lesson2.html

  9. A.B.E. • ABE (Automated Benthic Explorer): An untethered submersible, equipped with cameras and sensors, that navigates by sound beacons for long periods of time, “sleeping” on the ocean floor between pre-programmed duties until signaled to ascend for recovery.

  10. A.B.E.

  11. DECOMPRESSION CHAMBER • DECOMPRESSION CHAMBER: A large portable container that divers can enter after they’ve surfaced to help their bodies return to normal atmospheric pressure.

  12. ECHO SOUNDER • ECHO SOUNDER: A device used to determine depth by sound waves.

  13. ROV (REMOTELY OPERATED VEHICLE) • ROV (Remotely Operated Vehicle): Unmanned submersible tethered to a mother ship and operated by pilots using a joy stick.

  14. SCUBA (SELF-CONTAINED UNDERWATER BREATHING APPARATUS) • SCUBA: Device that allows divers to breathe underwater for long periods of time.

  15. SONAR (SOUND NAVIGATION RANGING) • SONAR: Used to measure ocean depth by sending sound to bounce off the ocean floor.

  16. SUBMERSIBLE: • SUBMERSIBLE: A small submarine used to explore the ocean depths; equipped with windows, lights, mechanical arms, cameras and other scientific instruments capable of seeing and recording data.

  17. Submersible

  18. LEO (Long-Term Ecosystem Observatory) • major goal for the Long-term Ecosystem Observatory (LEO) is to develop a real-time capability for rapid environmental assessment and physical/biological forecasting in coastal waters. • data is collected from satellites, aircrafts, ships, fixed/relocatable moorings, and autonomous underwater vehicles.

  19. ACTIVITY: 20,000 LEAGUES UNDER THE SEA • HANDOUT (story passage) • DRAW YOUR INTERPRETATION

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