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Bell ringer

Bell ringer. Write one paragraph on what you already know or what you think sonar is. Write this in the right side of your book. Sonar. By: Krys Parker, Julia McLees ,and Warren Neal. Purpose. Sonar is used to measure depths and locate objects so that we can map the ocean floor.

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Bell ringer

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  1. Bell ringer • Write one paragraph on what you already know or what you think sonar is. Write this in the right side of your book.

  2. Sonar By: Krys Parker, Julia McLees ,and Warren Neal

  3. Purpose • Sonar is used to measure depths and locate objects so that we can map the ocean floor

  4. More about sonar • It was Lewis Nixon who invented the very first sonar- type listening device in 1906 while trying to detect ice burgs in the area. • There are two types of sonar, the passive sonar and the active sonar • Another name for sonar was sound navigation and ranging.

  5. Passive Sonar • Passive sonar is essentially listening for the sound made by vessels.

  6. Active Sonar • Active sonar is emitting pulses of sound waves and listening for the echoes.

  7. How sonar works • Step one: a special navigation system listens for sounds. • Step two: it reads the sounds and determines how far away it is. • Step three: they travel to that area and see if they found whatever they were looking for.

  8. Who uses sonar? • Geologists can use sonar mapping to look below the ocean bottom to learn something about the underlining rock structures • Oceanographers/marine biologists use sonar to help us gain a better understanding of how are oceans and living creatures in them function as a ecosystem

  9. What types of animals use sonar • Dolphins, whales, some fish and bats are just some of the animals that use sonar in there daily lives to find there way as they move about.

  10. Sonar Helps End War • Sonar was first proposed to help detect icebergs at sea. Later on, it became popular to detect enemy submarines during World War I.

  11. Sonar for Fun • Sonar is used for fish finding, especially during deep sea fishing.

  12. Homework • Write one paragraph on what you learned about sonar from today. Write it in the left side of your notebook. • DUE MONDAY!

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