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Changes on the Earth’s Surface

Changes on the Earth’s Surface. Mr. Vranderic – World Geography. GOAL. To explain how the Earth’s surface changes due to weathering and erosion. Weathering. The breaking down of rock on the Earth ’ s surface into smaller and smaller pieces. Weathering. Chemical Weathering.

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Changes on the Earth’s Surface

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  1. Changes on the Earth’s Surface Mr. Vranderic – World Geography

  2. GOAL • To explain how the Earth’s surface changes due to weathering and erosion

  3. Weathering The breaking down of rock on the Earth’s surface into smaller and smaller pieces. Weathering

  4. Chemical Weathering Def: Chemical makeup of the rock is altered or changed into new materials Weathering

  5. Chemical Weathering 1. Dissolving by water Weathering

  6. Chemical Weathering 2. Reactions with oxygen Weathering

  7. Chemical Weathering 3. Excess carbon dioxide in air decomposes rock Weathering

  8. Chemical Weathering 4. Acid Rain Weathering

  9. Chemical Weathering 5. Plant Acids leak onto rocks Weathering

  10. Mechanical Weathering Def: rocks are physically broken smaller without changing what they are made of Weathering

  11. Mechanical Weathering 1. Temperature expansion & contraction cracks rocks Weathering

  12. Mechanical Weathering 2. Frozen water cracking Weathering

  13. Mechanical Weathering 3. Root-pry Weathering

  14. Mechanical Weathering 4. Gravity/Landslides Weathering

  15. Mechanical Weathering 5. Abrasion by Wind Weathering

  16. Erosion Def: Weathered rock particles are carried away Erosion

  17. Deposition Def: Eroded rock particles are dumped off into a new location Deposition

  18. Gravity Pulls rocks down slopes Causes landslides, mountain erosion Famous: Laguna Beach Landslide Vancouver Island San Diego Landslide Five Agents of Erosion

  19. Wind Air currents lift and carry materials to new locations Scrapes away landforms Makes new landforms through deposition (dunes) Famous: Grand Canyon (W. U.S.) North Africa Asia Australia NW China Southern S. America Five Agents of Erosion

  20. Running Water Drags rocks along in water, cutting into soil (abrasion) Deepens, widens rivers Deposited sediments create curves, deltas, alluvial fans Famous: Niagara Falls Grand Canyon Nile River Five Agents of Erosion

  21. Niagara Falls

  22. Niagara Falls

  23. Waves Crashes beaches, scrapes, slams, dissolves pieces off rocks Wave erosion creates arches, caves, cliffs Wave deposition creates bars, spits Famous: Sea cliffs of Tuscany & Sicily Italy Five Agents of Erosion

  24. Glaciers Moving mass of ice and snow Picks up and scrapes rock across other rock Widens valleys, dumps rock to make new landforms Famous: Finger Lakes Great Lakes Five Agents of Erosion

  25. Assessment • Which agent of erosion created the formation below?

  26. Assessment • Which agent of erosion carved the formation below?

  27. Assessment • Which agent of erosion carved the formation below?

  28. Assessment • Which agent of erosion created the formation below?

  29. Assessment • Which agent of erosion created the formation below?

  30. Assessment • Which agent of erosion created the formation below?

  31. Assessment • Which agent of erosion created the formation below?

  32. Family Photos

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