Types OF Weathering

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Types OF Weathering
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Types of Weathering

• ____________ Weathering only changes the shape.
• __________ Weathering changes the composition.

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Types of Weathering

• Mechanical Weathering only changes the shape.
• __________ Weathering changes the composition.

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Types of Weathering

• Mechanical Weathering only changes the shape.
• Chemical Weathering changes the composition.

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Why do rocks weather?

• The conditions ____
• _____________ are different from the conditions
  in which __________.
• They are ____ exposed to the elements

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Why do rocks weather?

• The conditions at the surface are different from
  the conditions in which __________.
• They are ____ exposed to the elements

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Why do rocks weather?

• The conditions at the surface are different from
  the conditions in which it formed.
• They are ____ exposed to the elements

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Why do rocks weather?

• The conditions at the surface are different from
  the conditions in which it formed.
• They are now exposed to the elements

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What controls the weathering?

• ___________________
• _____________
• __________

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What controls the weathering?

• Mineral composition
• _____________
• __________

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What controls the weathering?

• Mineral composition
• Particle size
• __________

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What controls the weathering?

• Mineral composition
• Particle size
• Climate

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Mechanical Weathering

• Mechanical and Chemical Weathering work
  __________.
• More ____________ weathering is able to take
  place after ______________ weathering has.

surface area
surface area
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Mechanical Weathering

• Mechanical and Chemical Weathering work together.
• More ____________ weathering is able to take
  place after ______________ weathering has.

surface area
surface area
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Mechanical Weathering

• Mechanical and Chemical Weathering work together.
• More chemical weathering is able to take place
  after ______________ weathering has.

surface area
surface area
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Mechanical Weathering

• Mechanical and Chemical Weathering work together.
• More chemical weathering is able to take place
  after mechanical weathering has.

surface area
surface area
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Types of Mechanical Weathering

• Ice or Frost Wedging water takes up 10 more
  space when it ________ than when it is melted.

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Types of Mechanical Weathering

• Ice or Frost Wedging water takes up 10 more
  space when it freezes than when it is melted.

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Ice Wedging
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Ice Wedging
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Ice Wedging
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Wetting and Drying

• clay materials expand and contract when they are
  exposed to water or dry out
• wet ______________
• dry _______________
• Forms ____________

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Wetting and Drying

• clay materials expand and contract when they are
  exposed to water or dry out
• wet swelling
• dry _______________
• Forms ____________

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Wetting and Drying

• clay materials expand and contract when they are
  exposed to water or dry out
• wet swelling
• dry shrinking
• Forms ____________

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Wetting and Drying

• clay materials expand and contract when they are
  exposed to water or dry out
• wet swelling
• dry shrinking
• Forms Mud cracks

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Fossil Mudcracks
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Fossil Mudcracks
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Mudcracks
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Exfoliation

• rocks from the deep rise to surface and are
  exposed to less pressure it peels in layers

PRESSURE and STRESS Within the Mountain
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Exfoliation
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Exfoliation
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Half Dome Yosemite Park, CA
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Plant roots

• plants grow on rocks, roots go down into small
  cracks, then growing roots get bigger and
  _________________

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Plant roots

• plants grow on rocks, roots go down into small
  cracks, then growing roots get bigger and break
  the rock

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Root Wedging
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Root Wedging