Coastal features of erosion


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Coastal features of erosion

  1. 1. Natural System Coastal Features of Erosion By Yanique Gordon Group 2c6 ID:102168470
  2. 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
  3. 3. Content Objectives Rationale Introduction Waves Constructive/ Destructive Wave Coastal Erosion Landforms of Costal Erosion Headlands and Bays Cliffs and Waves cut platform Caves, Arch, Stack and Stump Additional Information Quiz Conclusion Reference Click on the links to research
  4. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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 attam/lithosphere-coasts
  16. 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. 17. • Question 2 The movement of water up the shore is known as a) Backwash b) Wave length c) Swash d) Swells
  18. 18. • Question 3 Identify the landform in the picture a) Headland b) Stack c) Stump d) Cave
  19. 19. • Question 4 Identify the landform a) Beach b) Cave c) Arch d) Bay
  20. 20. 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
  21. 21. 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