How do weathering
and erosion shape
the land?
UNIT C:
CHAPTER 5: LESSON 5:
Weathering
 The process in which rocks or other materials are broken down.
Different types of weathering:
Physical weathering Chemical weathering
Physical Weathering:
Physical weathering is caused by:
1) Temperature changes
(Causes rocks to crack)
2) Plant roots growing in rocks breaking the rocks.
3) Water freezing in cracks between rocks cause the
rocks to break apart.
4) Rubbing
5) Animals making burrows.
Chemical Weathering:
Occurs when chemicals break down the rocks.
1) Water dissolves rocks.
The agents of chemical weatheri...
2) Acid Rain
Formed when gases from factories combine with rain water.
Erosion
 The process by which water, ice, wind or gravity moves
fragments of rock and soil.
If a particle is loosened by
weathering, but stays put, its
just weathering.
If it starts moving, its Erosion.
Water Erosion
 Rivers, streams, and runoff
Ice Erosion
 Glaciers
Wind Erosion
Mass Movements
 Landslides, mudslides, slump and creep
Get out a piece of paper
and identify if the
following involve
weathering, erosion,
both, or neither.
Ready?
1.Waves are crashing on a sand
beach.
2.Water expands as it freezes in
the cracks of rocks.
3. Pebbles move down a ...
4. Acid rain causes the
decomposition of a statue in
New York.
5. A man shovels dirt to plant a
tree.
6. A Glacier slowly ...
9. A boy takes out the
garbage for his mother.
10. A shovel is left outside
and begins to rust.
Once you’ve answered these...
Let’s Discuss The Questions.
1. As the sand is moving there is
definitely erosion; there is also
abrasion from the sand ga...
2. This is frost wedging so it’s
mechanical weathering.
There is no mention of
movement. Weathering
3. There is probably some
weathering, but there is
definitely erosion. Erosion or
Both
4. Acid rain on a statue is
chemical weathering. This is
mainly Weathering.
5. Since the man is
transporting Earth materials,
it’s Erosion.
6. A glacier moving down a
mountain would have both
weathering and erosion.
Both
7. A tree’s roots growing into
cracks of rocks would be
weathering. Weathering
8. A major volcanic eruption
would involve both
weathering and erosion.
Both
9. Unless the garbage has
“Earth Material” or dirt in it
there is probably no erosion
or weathering. Neither
10. The rusting of a shovel is
oxidation. This is chemical
weathering. Weathering
The process by which materials are
dropped off at another place is called:
Deposition
Erosion and
deposition work
together to change
the shape of the
earth’s surface.
Ways that erosion and deposition work together:
1) Running water
Slow moving water Deposition
Fast moving water Erosion
2) Waves
Headland
Land surrounded by
water from 3 sides.
When waves reach a headland they
curve around it and wash away at
the sides of the headland.
3) Wind
Wind erodes sand and rock, when the
wind slows down the sand and rock get
deposited.
How can people protect shorelines?
 Shorelines may be damaged when more sand is
eroded than deposited.
People can protect shorelines by:
 1) Building dams (to change the speed and direction
of water)
 2) Building levees (prevent floods)
 3) Building barricades (prevent beach erosion)
 4) Building fences (prevent sand erosion by wind)
Ch.5.less.5.how do weathering and erosion shape the land
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Transcript of "Ch.5.less.5.how do weathering and erosion shape the land"

  1. 1. How do weathering and erosion shape the land? UNIT C: CHAPTER 5: LESSON 5:
  2. 2. Weathering  The process in which rocks or other materials are broken down.
  3. 3. Different types of weathering: Physical weathering Chemical weathering
  4. 4. Physical Weathering: Physical weathering is caused by: 1) Temperature changes (Causes rocks to crack)
  5. 5. 2) Plant roots growing in rocks breaking the rocks.
  6. 6. 3) Water freezing in cracks between rocks cause the rocks to break apart.
  7. 7. 4) Rubbing
  8. 8. 5) Animals making burrows.
  9. 9. Chemical Weathering: Occurs when chemicals break down the rocks. 1) Water dissolves rocks. The agents of chemical weathering:
  10. 10. 2) Acid Rain Formed when gases from factories combine with rain water.
  11. 11. Erosion  The process by which water, ice, wind or gravity moves fragments of rock and soil.
  12. 12. If a particle is loosened by weathering, but stays put, its just weathering. If it starts moving, its Erosion.
  13. 13. Water Erosion  Rivers, streams, and runoff
  14. 14. Ice Erosion  Glaciers
  15. 15. Wind Erosion
  16. 16. Mass Movements  Landslides, mudslides, slump and creep
  17. 17. Get out a piece of paper and identify if the following involve weathering, erosion, both, or neither.
  18. 18. Ready? 1.Waves are crashing on a sand beach. 2.Water expands as it freezes in the cracks of rocks. 3. Pebbles move down a stream with the current.
  19. 19. 4. Acid rain causes the decomposition of a statue in New York. 5. A man shovels dirt to plant a tree. 6. A Glacier slowly moves down a mountain. 7. A tree’s roots grow into the cracks of rocks. 8. A major volcano erupts.
  20. 20. 9. A boy takes out the garbage for his mother. 10. A shovel is left outside and begins to rust. Once you’ve answered these, discuss you’re answers with the rest of the class before you go on.
  21. 21. Let’s Discuss The Questions. 1. As the sand is moving there is definitely erosion; there is also abrasion from the sand gains colliding. Both
  22. 22. 2. This is frost wedging so it’s mechanical weathering. There is no mention of movement. Weathering
  23. 23. 3. There is probably some weathering, but there is definitely erosion. Erosion or Both
  24. 24. 4. Acid rain on a statue is chemical weathering. This is mainly Weathering.
  25. 25. 5. Since the man is transporting Earth materials, it’s Erosion.
  26. 26. 6. A glacier moving down a mountain would have both weathering and erosion. Both
  27. 27. 7. A tree’s roots growing into cracks of rocks would be weathering. Weathering
  28. 28. 8. A major volcanic eruption would involve both weathering and erosion. Both
  29. 29. 9. Unless the garbage has “Earth Material” or dirt in it there is probably no erosion or weathering. Neither
  30. 30. 10. The rusting of a shovel is oxidation. This is chemical weathering. Weathering
  31. 31. The process by which materials are dropped off at another place is called: Deposition
  32. 32. Erosion and deposition work together to change the shape of the earth’s surface.
  33. 33. Ways that erosion and deposition work together: 1) Running water Slow moving water Deposition Fast moving water Erosion
  34. 34. 2) Waves Headland Land surrounded by water from 3 sides.
  35. 35. When waves reach a headland they curve around it and wash away at the sides of the headland.
  36. 36. 3) Wind Wind erodes sand and rock, when the wind slows down the sand and rock get deposited.
  37. 37. How can people protect shorelines?  Shorelines may be damaged when more sand is eroded than deposited.
  38. 38. People can protect shorelines by:  1) Building dams (to change the speed and direction of water)
  39. 39.  2) Building levees (prevent floods)
  40. 40.  3) Building barricades (prevent beach erosion)
  41. 41.  4) Building fences (prevent sand erosion by wind)
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