Tides.

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Presentation transcript:

Tides

There are Two Tidal Bulges

Both Moon and Sun Cause Tides

Tides and the Real Oceans

How Tides Move in the Oceans

How Tides Move in the Oceans

Tides Affect Earth's Rotation

Tides and the Boston Tea Party, December 16, 1773 Near Earth's perihelion: strong solar tides Near lunar perigee: strong lunar tides Full moon on December 13: spring tide Overall effect: unusually large tidal range

The Boston Tea Party, December 16, 1773

Tides and the Battle of Tarawa, November 20, 1943 Near Earth's perihelion: strong solar tides Near lunar apogee: weak lunar tides Near last-quarter moon: neap tide Overall effect: unusually small tidal range

Location of Tarawa

The Attack on Tarawa

Tarawa: What the Planners Wanted

What Actually Happened 1027 Marines killed, 2292 wounded