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Weathering and Climate 6.5 c, d

Weathering and Climate 6.5 c, d. Weathering. The break down of rocks, minerals, and soils at or near the Earth's surface by wind, water, organisms and atmospheric conditions is called weathering. Two types of weathering: Physical weathering Chemical weathering

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Weathering and Climate 6.5 c, d

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  1. Weathering and Climate6.5 c, d

  2. Weathering • The break down of rocks, minerals, and soils at or near the Earth's surface by wind, water, organisms and atmospheric conditions is called weathering. • Two types of weathering: • Physical weathering • Chemical weathering • Weathering is distinguished from erosion in that no transportation of material is involved.

  3. Physical Weathering • The break down of material by physical or mechanical means. Physical weathering does not change the material into a new substance.

  4. Examples of Physical Weathering • Freezing water (ICE WEDGING) can break rock without any change in the minerals that form the rock. This usually produces small particles and sand. • Tree roots • Sand blasting (wind)

  5. This is an example of how a tree and its roots can breakdown \ or weather a rock.

  6. This is an example of how wind (sand blasting) can weather a rock.

  7. Chemical Weathering • The breakdown of material by chemical reactions that changes the composition of the material is called chemical weathering.

  8. Examples of Chemical Weathering • Oxidation = is the interaction between oxygen molecules and all the different substances they may contact, from metal to living tissue. (GOOD AND BAD) • Carbonation = is the term for the conversion of an organic substance into carbon

  9. OXIDATION

  10. In weathering environments, the element that is most susceptible to oxidation is iron (Fe).

  11. Carbonization • Some fossils are produced by carbonization • First image is carbonized leaf from the Eocene Green River Formation, Wyoming • Second image is from the Cambrian Burgess Shale, Canadian Rockies

  12. 6.5 d How large bodies of water help moderate our climate.

  13. Large bodies of water (like the ocean) play a big part in controlling and moderating our climate. • Climates around large bodies of water tend to be milder. In other words, the winters are less cold and the summers are less hot. • WHY?

  14. WHY? • Because water heats up more slowly and cools down more slowly than land does thus making the winters less cold and the summers less hot.

  15. What would happen if water heated up quicker and cool down quicker than land? • More severe storms • Unsteady climate

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