A basic presentation of the coasts, suitable for Year 9 Geography. It includes: the definition of a coast, etymology, pelagic coasts and shores, the formation of the coasts, environmental importance, human uses of a coast, coasts and tourism, coast pollution, fishing declining, coastal landforms, cliff erosion, natural arch, sea caves, stacks, stumps, wave-cut notches and wave-cut platforms.
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2. Title Page
Institution:
Course:
Name:
Id # :
Date :
Major:
The Mico University
College
Advance Application for
the 21 Century classroom
Yanique Gordon
102168470
December 13, 2013
Geography
Coastal Features of Erosion
Grade 9
4. Objectives
At the end students must be able to:
General Objectives: Understand that
landforms was created by costal erosions
Specific Objectives:
• Explain waves
• Differentiate between wave types
• Name and identify coastal landforms
• Describe the different landforms
5. Rationale
• It is important for students to understand and
appreciate the environment in which they
live. The processes of coastal erosion is
naturally dynamic and often impact the
ecological environment. This PowerPoint
allow students to interact as well as promote
independent learning.
6. Introduction
Earth has changed! The indentation in
mountains and boulders that you see in the
water, passing the coast were once apart of
mountains. You may believe that they look
like they've been there forever, but the truth
is that they a result of erosion. The effects
of waves have left exposed areas to erosion
creating different landforms along the coast.
7. Waves
• Most Waves are formed by wind blowing
across the surface of the sea. Waves
shape landforms through erosion
transportation and deposition.
• The movement of surf waves up the shore
is known as swash. The swash takes
sand particles up the beach
8. Constructive/Destructive Wave
• Then the water starts to flow back down the
beach. This is back wash of the waves; it
drags sediment from the beach into the water
There are two types of breaking waves:
1. Constructive Wave- these waves help build
beaches
2. Destructive waves: these erode coastline
and beaches
Click on the link below to show how breaking waves are formed:
deconstructive and constructive waves
9. Coastal Erosion
• Erosion is when wind, water, and ice take
away sediments of land. Sediment is
made of rocks, dirt, and earth.
• Coastal erosion occurs along beaches
and shorelines Both wind action and water
action constantly change the boundary
between land and water.
10. Landforms of Coastal Erosion
• Coastal erosion takes land away forever
from one area to deposit it someplace
else.
• The most recognizable feature of coastal
erosion are:
1) Headlands and Bays
2) Cliffs and waves cut platforms
3) 3)Cave Arch Stack and stumps
11. Headlands and Bays
This video shows formation of headlands
and bay. As well as give example of St
Brides Bay in United Kingdom
Headlands – These are
large pieces of land
mass which juts out into
the sea.
The indented area
between two headlands
is known as a bay.
12. Cliffs and Wave cut platform
Click on the link below to show how wave-cut platform is formed:
cliffandwavecuts
A Wave cut platform is a narrow
flat area often seen at the base of
a sea cliff caused by the action of
the waves
Cliffs begin to form when waves
attack the bottom of the rock
leaving what is called a hanging
notch.
13. Cave Arch Stack and Stumps
• Caves occur when waves force their way
into cracks in the cliff face. The water
contains sand and other materials, grinds
away at the rock until the cracks become a
cave.
• If the cave is formed in a headland, it may
eventually break through to the other side
forming an arch.
14. Cave Arch Stack and Stumps
• When the arch becomes bigger it
eventually collapses, leaving the
headland on one side and a stack on the
other.
• The stack will be attacked at the base in
the same way that a wave-cut notch is
formed. This weakens the structure and it
will eventually collapse to form a stump.
15. Additional Information
Click on the web addresses
below for different resources
on costal landforms
DownloadsStack formation
(1).ppt
YouTube - How Waves Work
This video shows the effect of costal
erosion
http://www.slideshare.net/exp
attam/lithosphere-coasts
16. Quiz
Multiple Choice
Question 1
What is Costal Erosion?
a) The wearing away of the land
b) The falling of a cliff
c) The wearing away of land by the sea
d) The movement of the waves
17.
18.
19. • Question 2
The movement of water up the shore is
known as
a) Backwash
b) Wave length
c) Swash
d) Swells
20.
21.
22. • Question 3
Identify the landform in the picture
a) Headland
b) Stack
c) Stump
d) Cave
24. Conclusion
• Erosion not only shapes our planet's
surface, but it affects the environment in
numerous ways as well. This process,
known as erosion, is gradually wearing
down the coastline. Erosion can move
mountains and create formations such as
arches, headlands and so on
25. Reference
• Wilson Mark(2005).Natural System. The
Caribbean Environment for CXC
Geography. (pg 56-61)
• Anthony Bennett (2009). Coast Menu.
Retrieved from
http://www.geography.learnontheinternet.c
o.uk/topics/waves.html