2. What is under there anyway?

3. 3 of the Major Oceans
Atlantic – the shallowest ocean (3.3km average depth)
Indian – second shallowest ocean (3.8km average depth)
Pacific – the deepest ocean (3.9km average depth)

4. There are over 100 seas – what were the original “Seven Seas”?
The Seven Seas
There are over 100 seas – what were the original “Seven Seas”?

5. And the Seven Seas are…. In Medieval Times…. In Modern Times -
Mediterranean Sea
North Pacific Ocean
Adriatic Sea
South Pacific Ocean
Red Sea
North Atlantic Ocean
Black Sea
South Atlantic Ocean
Arabian Sea
Indian Ocean
Caspian Sea
Arctic Ocean
Persian Gulf
Southern Ocean

7. SONAR
Important to help map ocean floor
Sound Navigation and Ranging

8. How SONAR works…
ocean surface
receiver
transmitter
ocean floor

9. Differences in the time it takes for the sound waves to leave the boat and then return tell scientists how deep the ocean bottom is.

10. Side-scan sonar is used to create an image of large areas of the sea floor.
This tool is used for mapping the seabed in conjunction with seafloor samples it is able to show differences in material and texture type of the seabed.

18. Significance of Mapping…

20. Increases our understanding of currents…