Physical and Chemical Weathering Eric Angat Teacher.

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Presentation transcript:

Physical and Chemical Weathering Eric Angat Teacher

1.What are the two types of weathering? 2.What are the different types of physical weathering? 3.How is root wedging similar with frost wedging? 4.Why are rivers rocks rounded and smooth? Think! 5.What is differential weathering? 6.What is the relationship between climate and weathering 7.What is the relationship between surface area and weathering?

Physical or Mechanical weathering

Types of Physical or Mechanical Weathering 1.Frost wedging 2.Root wedging 3.Abrasion 4.Exfoliation 5.Differential weathering

Rock hardnessRate of weathering Surface areaRate of weathering

Physical or Mechanical weathering

This is an example of root wedging Roots produce carbonic acid that dissolves minerals in rocks. ( chemical ) Roots grow through cracks in rocks. ( physical)

This is an example of of tumbling and abrasion Abrasion happens when rocks rub together. Tumbling happens when rocks roll on the surface hitting other rocks.

This is an example of differential weathering. Minerals in the middle of the rock is more prone to weathering.

1.What are the two types of weathering? 2.What are the different types of physical weathering? 3.How is root wedging similar with frost wedging? 4.Why are river rocks rounded and smooth? Think! 5.What is differential weathering? 6.What is the relationship between climate and weathering 7.What is the relationship between surface area and weathering?

Chemical Weathering

Chemical weathering

8. What are the different types of chemical weathering? 9. How is chemical weathering different from physical weathering? 10. How is weathering different from erosion?

Types of Chemical Weathering 1.Hydrolysis 2.Oxidation 3.Carbonation 4.Lichens 5.Acid precipitation