# Oceans by avatar985

VIEWS: 20 PAGES: 21

• pg 1
```									    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?
PREDICT:What percent of the earth’s
water is salt? What percent is fresh?
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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