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TIDES:
(Did you go to a sea or an ocean? The waters rise and fall, move back and forth. These are the tides).
The tides
are 2 types.
1.
Spring tides (High tides)
2.
Neap tides (low tides).
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ü The tides are nothing but the rise and fall
of the level of water in the seas and the oceans.
ü The Sun and the moon both exert pull force on
the earth.
ü The tides are primarily a result of the
attraction of the moon.
ü The pull force is exerted on the water that
is present on the earth and the water can easily rise.
ü High tides occur every 12 ½ hours.
ü In between two high tides occur two low
tides.
ü High tides occur when the tide producing
forces of both the moon and the sun complement each other.
ü These are called spring tides.
ü The spring tides occur on full moon and new
moon days.
ü During this time the sun, the moon and the
earth are in the straight line.
ü The other types of tides are called neap
tides.
ü Neap tides occur when the pull forces of the
sun and the moon neutralize each other.
ü Neap tides occur during the 1st
and the 3rd quarter of the moon.
ü Perigean tides are stronger than the apogean
tides. (Why?, Please think for a movement, Perigee means the moon is nearer to
the earth and the pull force is more).
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