Coastal features of erosion
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Transcript of Coastal features of erosion
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Natural SystemCoastal Features of Erosion
By Yanique GordonGroup 2c6
ID:102168470
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Title Page
Institution: The Mico University
College
Course: Advance Application for
the 21 Century classroom
Name: Yanique Gordon
Id # : 102168470
Date : December 13, 2013
Major: Geography
Coastal Features of Erosion
Grade 9
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Content
Objectives
Rationale
Coastal Erosion
Landforms of Costal Erosion
Headlands and Bays
Cliffs and Waves cut platform
Constructive/Destructive
Wave
Waves
Introduction
Caves, Arch, Stack and
Stump
Additional Information
Quiz
Conclusion
Reference
Click on the links to research
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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
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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.
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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.
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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
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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
deconstructive and constructive waves
Click on the link below to show how breaking waves are formed:
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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.
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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
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Headlands and Bays
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.
This video shows formation of headlands and bay. As well as give example of St Brides Bay in United Kingdom
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Cliffs and Wave cut platform
cliffandwavecutsClick on the link below to show how wave-cut platform is formed:
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.
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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.
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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.
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Additional Information
This video shows the effect of costal erosion
Click on the web addresses below for different resources on costal landformsDownloads\Stack formation (1).ppt
YouTube - How Waves Work
http://www.slideshare.net/expattam/lithosphere-coasts
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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
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YESYOU ARE CORRECT
!!!!!
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Incorrect
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• Question 2
The movement of water up the shore is known as
a) Backwash
b) Wave length
c) Swash
d) Swells
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YESYOU ARE CORRECT
!!!!!
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Incorrect
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• Question 3
Identify the landform in the picture
a) Headland
b) Stack
c) Stump
d) Cave
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• Question 4
Identify the landform
a) Beach
b) Cave
c) Arch
d) Bay
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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
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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.co.uk/topics/waves.html
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The End !!!