Tides are caused by the gravitational attraction of the moon and sun on the oceans as well as the centrifugal force from the Earth's rotation. High tides occur where the moon is overhead, while low tides happen 90 degrees away, and both the moon and sun's gravitational pulls contribute to the regular rising and falling of sea levels, though the moon has a greater effect being closer to Earth.

1. TIDES
Tides result from gravitational attraction and
centrifugal effect.

2. TIDES
 The periodic rise and fall of
the water level in the sea.
The main reasons for the occurrence of
tides:
 The gravitational attraction exerted
on the earth by the sun and the moon.
 Centrifugal force created due to the
rotation of the earth.

3. TIDES AND THE MOON
 High tide occurs in those parts of the
ocean which face the moon.
 Low tide occurs at the same time in
those parts which are at an angular
distance of 90 degree to the high tide
regions.

4. VERY HIGH TIDE

5. NEEP TIDE-VERY LOW TIDE

7. SUN AND TIDES
 The sun also has a role in the occurrence of
tides.
 The distance of the sun from the earth is about
400 times the distance between the earth and the
moon
 The sun's gravitational pull on the earth is much
less than the gravitation pull of the moon
 The sun's gravitational attraction plays a role in
the occurrence of tides.

11. THANK YOU…
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