2. Getting StartedTake a look at how wave erosion has made an
impact on just one coastline. Pay particular attention to the
flags! 3. Waves are energy travelling through some sort of
material.They are created from wind blowing over thewater. 4. Parts
of a wave 5. Measuring Waves 6. What do the pictures mean? Wave
height: the vertical distance from thehighest part of a wave to the
lowestWavelength: the horizontal distance betweenone wave crest and
the next crest 7. What influences the size of a wave? Strong winds
for an extended (long) period of time-VS-Strong winds for a short
period of time 8. BIG waves!BIG storm, but dont worryit all
fizzlesout by morning 9. How do waves reach the shore? Generally,
they arrive at an angle One part of the wave reaches shallow water
sooner than the rest The water feels the bottom, which slows down
the wave 10. Wave Refraction Makes the wavebend Can change
theenergy of the wave: Concentrate it Disperse it 11. How do waves
erode the shoreline? As the waves break over time, they
steadilyerode away a little bit of the shoreline 12. Formations
caused by wave erosion 13. Wave-Cut Cliffs Waves that cut into the
bottom part of a cliff, eroding away the soil and rocks there 14.
ArchRightthereA cliff eroded from two sides, which produces an open
15. Sea Stack A piece of tall rock that remains after the material
above the arch eventually erodes away 16. So a sea stack is the
grown-upof the arch. 17. Beaches= Deposition 18. Beachescan alsobe
madeofQuartzCoral ShellsThat beach wasmost likely made Volcanicfrom
a mixture ofRockcoral and shells 19. Difference between Winter and
Summer During the summer, waves of lower energybring sand up on to
the beach and leave ittheremakes soft sand Communities sometimes
truck in loads ofsand for the summer, as it is carried awayby the
waves because of its density During the winter, waves and storms
ofhigher energy bring the sand back offshoremakes a steeper and
rockier beach 20. Deposition FormationsSpit:Ridges of sand that
extend away from the shore 21. Barrier Islands Landformedby sand
(Miami Beach) 22. Issues with Urbanization on Barrier IslandsA
barrier island is the first line of defense against hurricanesif
there are houses/businesses instead, it will hit them first 23.
GroinTraps sand on oneside of structure, insteadof allowing sand to
roll down the coastline 24. Issues with Constructing Groins The
other side of the groin no longer hassand (it is collected by the
wall) Often, another groin will be built to catchsand farther down
25. Structures built parallel to theshoreline Breakwater Seawall
26. Differences?Breakwater: built away from the shore in the water
A breakwater in a bay area can help keep boats safe from the energy
of breaking waves 27. Sea Wall Built right along the shore 28.
Please refer to theInteractive Activity
