Oceans

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					    Where are the
    Oceans?         Identify the Oceans


Tides
                                 Waves

Currents
           Ocean Storms       The Ocean
                              Floor
PREDICT: What percent of the earth is
covered in water? What percent is land?
Explain your prediction.
PREDICT:What percent of the earth’s
water is salt? What percent is fresh?
Explain your prediction.
           World Ocean Facts

              Area       Volume      Average   Maximum
           (1,000,000   (1,000,000    Depth     Depth
              km²)         km³)        (m)       (m)
Atlantic
             82.4         323.6       3926      9200
Ocean
Pacific
             165.2        707.6       4282      11,022
Ocean
Indian
             73.4         291.0       3963      7460
Ocean
 Arctic
             14.1         17.0        1205      4300
Ocean
Arctic Ocean

                       Atlantic
 Pacific Ocean         Ocean
                                        Indian
                                        Ocean




 On your map, color the warm currents red and
  the cold currents blue. Label the 4 oceans.
Making Currents
         What causes tides?
The gravitational forces of the moon and sun on
the water causes the tides..

The moon, being nearest, has the greatest
effect even though the sun is the larger of
the two.

High tides are generated on the sides of
the Earth nearest to and farthest from the
moon
                  During new and
                  full moon phases
                  the moon, sun,
                  and Earth are
                  aligned causing a
                  greater
                  gravitational pull
                  on the Earth.
This results in
higher high
tides and lower
low tides.
How are Tides
 Predicted?
•Still-Water Line - The level of the ocean if it were flat
without any waves.

Crest - The highest part of the wave above the still-
water line.

Trough - The lowest part of the wave below the still-
water line
•Wave Height - The vertical distance between the
crest and the trough.

•Wavelength - The horizontal distance between
each crest or each trough.
    •Wave Period - The time it takes for two successive
    waves to pass a particular point. For example, it you are
    standing on a pier and start a stopwatch as the crest of a
    wave passes and then stop the stopwatch as the crest of
    the next wave passes, you have measured the wave period.


     Wave Frequency - The number of waves that
     pass a particular point in a given time period.


Amplitude - The amplitude is equal to one-half the wave
height or the distance from either the crest or the trough to the
still-water line.
What Makes A Wave?




 Let’s Make A Wave
   Hurricane       Tsunami



          Ocean Storms

El Nino                  Typhoon

               Cyclone
             Neptune’s Web
     Ocean Weather, Temperature, and
                 Tides
Ocean Planet Exhibit in the Smithsonian
     Museum of Natural History

           Secrets at Sea Game
ea Game

				
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