this is the ppt of tides

2.  Tides are very long-period waves that move through
the oceans in response to the forces exerted by the
moon and sun.
 Tides are the periodic rise and fall of the water level in
the sea.
 Tides originate in the oceans and progress towards
the coastlines.
WHAT ARE TIDES ?

3. LOW TIDES

4. TIDES

5.  Sea level rises over several hours, covering the
intertidal zone.
 The water rises to its highest level, reaching high
tide.
 The water stops falling , reaching low tide.
 Low tides and high tides are helpful for fisherman
going for fishing.
DIFFERENT TYPES OF TIDES

6.  Big ships can even enter in shallow harbours.
 Tides helps in keeping the beaches clean.
HOW TIDES HELP THE SHIP

7. SHIPS

8.  Salt pans fill with water during high tides.
 With the help of tidal energy electricity can be
generated.
 Some generation is possible for most of the tidal
cycle, in practice turbines lose efficiency at lower
operating rates.
POWER GENERATION

9.  The fishing boat constructed on the shore are taken
to the water at high tide.
 Tides helps the man in many ways and its influence
the human life.
TIDES HELP HUMAN LIFE