Oceans

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Where are the Oceans?
Identify the Oceans
Oceans
Tides
Waves
Currents
The Ocean Floor
Ocean Storms
2
Where are the Oceans?
3
PREDICT What percent of the earth is covered in
water? What percent is land? Explain your
prediction.
4
PREDICTWhat percent of the earths water is
salt? What percent is fresh? Explain your
prediction.
5
Identify the Oceans of the World
6
World Ocean Facts
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1
2
3
4
5
8
Currents
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Arctic Ocean
Atlantic Ocean
Pacific Ocean
Indian Ocean
On your map, color the warm currents red and the
cold currents blue. Label the 4 oceans.
10
Making Currents
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Tides
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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

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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.
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How are Tides Predicted?
15
Waves
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• 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.

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• 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.
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What Makes A Wave?
Lets Make A Wave
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Tsunami
Hurricane
Ocean Storms
Typhoon
El Nino
Cyclone
20
Resources
Neptunes Web
Ocean Weather, Temperature, and Tides
Ocean Planet Exhibit in the Smithsonian Museum of
Natural History
Secrets at Sea Game
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Let's Play Jeapordy