Weathering

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Weathering
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I can.

• Identify the layers of the earth
• Describe how landforms can be changed by
  weathering and erosion
• Explain how water can change landforms such as
  creating caves and deposition of sediments

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Weathering

• Weathering- (Destructive Force) the term that
  describes all the processes that break down rocks
  in the environment near the earth's surface.
• Erosion- The movement of weathered rock

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• Mechanical Weathering- processes tear apart rocks
  by breaking them into smaller pieces, by
  physically destroying them.

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• Frost Wedging - Water seeps into cracks of rock,
  freezes, expands, and breaks the rock.

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• Tree roots-Tree root tips are tiny and penetrate
  easily into fine fractures of rocks. As the
  roots grow in diameter, they put stress on the
  rock that can cause the fractures to expand

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• Abrasion is simply the mechanism of rocks
  breaking or wearing down by the direct actions of
  other rocks.

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• Chemical weathering breaks down rocks one atom at
  a time, dissolving minerals or changing one
  mineral into a more stable one
• Usually occurs by water

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• Dissolution- tears mineral grains apart and
  carries away the ions
• Think of salt dissolving in water
• The reason for caves

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• Oxidation- When oxygen chemically reacts with a
  mineral
• ExampleRust

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