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Sec 1 Exp - Erosion


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Sec 1 Exp - Erosion

  1. 1. Erosion <ul><li>The process of </li></ul><ul><ul><li>Wearing down surface materials. </li></ul></ul><ul><ul><li>Moving them from one place to another. </li></ul></ul>
  2. 2. The 3 agents of erosion <ul><li>Wind </li></ul><ul><li>Wave </li></ul><ul><li>Water (Running water) </li></ul>
  3. 4. Action of water <ul><ul><li>Water in streams and rivers carry a lot of sediments. </li></ul></ul><ul><ul><li>As the water runs over rocks, the sediments act like sandpaper, scraping and wearing away the rocks. </li></ul></ul>
  4. 10. Action of waves <ul><li>The constant breaking of waves against the shore erodes the seashore to produce the fine sand found on beaches </li></ul><ul><ul><li>It also results in landforms such as caves and cliffs </li></ul></ul>
  5. 18. <ul><ul><li>Wind erosion occurs in areas with little water and few plants to hold the soil in place. </li></ul></ul><ul><ul><li>Strong winds can carry large amounts of sand which rub and wear away surfaces of rocks in their path </li></ul></ul><ul><ul><li>Tends to take place mainly at the base of rocks, resulting in interesting landforms </li></ul></ul>Action of wind
  6. 19. Denudation <ul><li>The combined processes of weathering and erosion </li></ul><ul><li>Prolonged denudation can remove the natural protective layer over the Earth </li></ul><ul><li>This layer may be top layer of soil or vegetation that holds the soil down </li></ul>