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Weathering Erosion and Deposition

Used for class. Loads of fun.

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Weathering Erosion and Deposition

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  1. Weathering, Erosion, and Deposition

  2. Weathering • Weathering is the breakdown of rock at the Earth’s surface. • Some of these changes happen quickly and some happen slowly. • There are 2 Types: • Mechanicaland Chemical

  3. Mechanical Weathering • Mechanical Weathering – the type of weathering where rock is broken down into smaller pieces without changing the chemical properties of the rock. • This can be caused by freezing and thawing, release of pressure, growth of plants, and actions of animals (including humans).

  4. Example: Water seeps into a crack in a rock When the water freezes, it expands The force of the water expanding causes the rock to crack more. This is called ice wedging Freezing and Thawing

  5. Plant Growth • Roots of trees and other plants enter into cracks of rocks. • As the plants get bigger, so do the roots. • The growing roots force the cracks further apart.

  6. Abrasion • Abrasion is the grinding away of rock by other rock particles. • These particles scrape away at other rocks like sandpaper on wood as they rub or roll against the surface.

  7. Chemical Weathering • Chemical weathering is the processes of breaking down rock through chemical changes. • 5 things that cause chemical weathering: water, oxygen, carbon dioxide, living organisms (like lichens) and acid rain. • Chemical weathering occurs more rapidly in warm wet climates.

  8. Chemical Change • Chemical Weathering causes the rock to experience a chemical change (changes its makeup) • Waterdissolves rocks over time • Oxygen causes oxidation (rusting) • Acid rain reacts with marble and limestone • Living organisms – plant roots produce weak acids to dissolve rock around the roots,

  9. ACID RAIN OXIDATION

  10. What type of weathering does each example cause? The roots of a plant An animal scratching Oxygen Water freezing Acid rain Wind Water A. Chemical Weathering B. Mechanical Weathering C. Both types of weathering CHECK- UP

  11. What type of weathering???

  12. What type of weathering???

  13. What type of weathering???

  14. What type of weathering???

  15. What type of weathering???

  16. What type of weathering???

  17. What type of weathering???

  18. “The Agents of Erosion and Deposition”

  19. Erosion moves SEDIMENTS to a new site. I like to think of this site as WWW.GG

  20. Erosion • When sediments are movedfrom one place to another by natural forces, this is called Erosion. • The agents of Erosion are • Wind • Water • Waves • Gravity • Glaciers

  21. Sediment • The material moved by erosion is sediment. • Sediment is small, solid particles of rocks or organisms.

  22. Deposition • When the sediment being carried is dropped (or deposited) in a new area, it is called deposition. • Depositions can create new landforms like beaches and sand dunes.

  23. Choose one of the following for each example: 1.) Erosion 2.)Deposition a. A river carrying sand b. Dropping sediment in a new location c. A glacier picking up a rock in it’s path. d. A beach is formed. e. How a sand dune is created f. How sediment is moved g. Sand being carried by the wind in a sandstorm. CHECK-UP

  24. G Erosion moves SEDIMENTS to a new site. I like to think of this site as WWW.GG W W W G

  25. What agent of erosion would MOST LIKELY occur at the Nile River?

  26. G Erosion moves SEDIMENTS to a new site. I like to think of this site as WWW.GG W Water Water carries sediments in things like rivers and streams. W G

  27. What agent of erosion would MOST LIKELY occur at the Appalachian Mountains?

  28. Gravity Erosion moves SEDIMENTS to a new site. I like to think of this site as WWW.GG W Water Water carries sediments in things like rivers and streams. W G

  29. What agent of erosion would MOST LIKELY occur at the Swiss Alps?

  30. Gravity Erosion moves SEDIMENTS to a new site. I like to think of this site as WWW.GG W Water Water carries sediments in things like rivers and streams. W Glaciers

  31. What agent of erosion would MOST LIKELY occur at the Mojave Desert?

  32. Gravity Erosion moves SEDIMENTS to a new site. I like to think of this site as WWW.GG Wind Wind carries sediments in the air. Water Water carries sediments in things like rivers and streams. W Glaciers

  33. What agent of erosion would MOST LIKELY occur at the beaches of Florida.

  34. Gravity Erosion moves SEDIMENTS to a new site. I like to think of this site as WWW.GG Wind Wind carries sediments in the air. Water Water carries sediments in things like rivers and streams. Waves Waves push and pull sediments. Glaciers

  35. WHO DONE IT? THE DELICATE ARCH VICTIM: The Delicate Arch SUSPECT(S): Wind EVIDENCE: Rounded edges from ABRASION. 4. CREW: Erosion

  36. WHO DONE IT? LANDSLIDE • VICTIM: LANDSLIDE • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  37. WHO DONE IT? BEACHES GETTING SMALLER • VICTIM: Beaches getting smaller • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  38. WHO DONE IT? SEA CLIFFS • VICTIM: Sea Cliffs • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  39. WHO DONE IT? SANDSTORMS • VICTIM: Sandstorms • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  40. WHO DONE IT? DELTAS FORMING AT THE END OF RIVERS • VICTIM: Deltas forming at the end of rivers • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  41. WHO DONE IT? THE GRAND CANYON • VICTIM: The Grand Canyon • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  42. WHO DONE IT? GLACIAL GROOVES IN BEDROCK • VICTIM: Glacial grooves in bedrock • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  43. WHO DONE IT? SEA STACKS • VICTIM: Sea Stacks • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  44. WHO DONE IT? BEACHES GETTING BIGGER • VICTIM: Beaches getting bigger • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  45. WHO DONE IT? MUDSLIDES • VICTIM: Mudslides • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  46. WHO DONE IT? ROCKY BEACHES TURNING TO SAND • VICTIM: Rocky beaches • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  47. WHO DONE IT? SAND DUNES • VICTIM: Sand dunes • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  48. WHO DONE IT? ROCKSLIDES • VICTIM: Rockslides • SUSPECT(S): www.gg (Wind, Water, Waves, Gravity, Glaciers) • EVIDENCE: Write down how you know. 4. CREW: Erosion or Deposition?

  49. Fin

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