5. • The submerged zone
OFFSHORE below the low tide
shoreline
• Between the low tide
FORESHORE and high tide
shorelines
• Stretches landward from
BACKSHORE the high tide shoreline to
the highest water line
6. If you realize the Actually there
coast is always are 3 main agents
changing. How do you that cause the
think its changing? coast to change
its shape
WAVE
WIND
SEA
CURRENT
7. Between the 3 agents,
which one you think is
the most important
agent which change
the shape of the
coastline?
WINDS
NO WINDS, NO
WAVES & SEA
CURRENTS
8. WAVE TERMINOLOGY
the highest part of a wave
distance between two consecutive crests
or two consecutive troughs
vertical distance between the
crest and the trough
the lowest part of a wave
9. Yes I
Do you know know, waves get
how waves its energy from
get its winds as well as
energy? fetch
Let me think
first, I think I
know
10. The
Speed of
distance of
the winds
the fetch
Waves
Energy
11. The greater the wind speed, the
higher the wave. Thus, the
higher the wave, the greater the
wave energy.
12. Fetch refers to the
distance of open water
over which the wind blows.
The longer the fetch, the
greater the waves energy
13. There are TWO movement of the
waves
SWASH carries sediment from the
ocean and deposits it on the
shore, thus building up a beach.
BACKWASH transports
the sediment down a beach.
