Physical and Chemical and Weathering. Name three causes of physical weathering.

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Physical and Chemical and Weathering

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Transcript of Physical and Chemical and Weathering. Name three causes of physical weathering.

Page 1: Physical and Chemical and Weathering. Name three causes of physical weathering.

Physical and Chemical and Weathering

Page 2: Physical and Chemical and Weathering. Name three causes of physical weathering.

Name three causes of physical weathering.

Page 3: Physical and Chemical and Weathering. Name three causes of physical weathering.

* Wind

* Water

a. Flowing

b. Glacier

c. Ice

* Plants

Page 4: Physical and Chemical and Weathering. Name three causes of physical weathering.

Wind causes Weathering

• Have you ever been outside on a windy day? Have you ever felt the sting of sand or other particles on your face on those windy days? Well, imagine what that wind and those particles are doing to the land around you or around the world over vast amounts of time. Let’s view and discuss some pictures taken of wind weathered earth materials.

Page 5: Physical and Chemical and Weathering. Name three causes of physical weathering.

Wind

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Flowing Water weathers the earth by moving

materials and wearing away earth materials

Page 9: Physical and Chemical and Weathering. Name three causes of physical weathering.
Page 10: Physical and Chemical and Weathering. Name three causes of physical weathering.
Page 11: Physical and Chemical and Weathering. Name three causes of physical weathering.

“V” shaped valleys are made by fast flowing water.

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GlaciersGlaciers are slow moving frozen

rivers that grind and wear away the earth in the path they travel.

http://www.uvm.edu/whale/Glacier2210.jpeg
Page 13: Physical and Chemical and Weathering. Name three causes of physical weathering.
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“U” shaped valleys are made by glaciers.

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IceIce weathers by the process

called “frost-wedging.” Water fills cracks in earth materials and then when it freezes, it

expands, cracking the material that held it.

Page 17: Physical and Chemical and Weathering. Name three causes of physical weathering.

Then when the temperature warms up, the water fills the new formed cracks and then freezes when temps lower and cracks the materials even more. Can you see how this process can wreak havoc on the environment? Notice how large potholes will grow this winter in the street near your house. This is due to frost-wedging.

Page 18: Physical and Chemical and Weathering. Name three causes of physical weathering.
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PlantsRoots grow into rocks, causing

them to crack.

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Page 24: Physical and Chemical and Weathering. Name three causes of physical weathering.

                                      Lichen on boulder, Cartersville, GA

                                      Close-up of lichen, Stone Mountain GA

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Wind, Water, Ice

                                          

      

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Name two causes of chemical weathering.

Page 28: Physical and Chemical and Weathering. Name three causes of physical weathering.

• Rusting

• Acid Precipitation

Page 29: Physical and Chemical and Weathering. Name three causes of physical weathering.

Rusting

• As iron in rock, etc. rusts, it flakes off. Over great amounts of time, the earth material can flake off in great amounts, thus weathering rocks and even mountains.

                                                                           

Weathering Rind, Wilhite Formation, eastern Tennessee

Page 30: Physical and Chemical and Weathering. Name three causes of physical weathering.
Page 31: Physical and Chemical and Weathering. Name three causes of physical weathering.
Page 32: Physical and Chemical and Weathering. Name three causes of physical weathering.

Acid Precipitation

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The Taj Mahal used to be sparkly white, but acid rain has given it its

yellowish-brown hue.

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Page 35: Physical and Chemical and Weathering. Name three causes of physical weathering.

Just as acid precipitation has weathered the Taj Mahal and the gargoyle in the previous slide, acid precipitation eats away at natural rock, mountains, etc. and over time can wear mountains away.

Page 36: Physical and Chemical and Weathering. Name three causes of physical weathering.

Think about all the ways the earth is weathered.

Think about all the ways that weathering can and has changed the “face” of the earth.

Make a Venn Diagram that compares/contrasts physical and chemical weathering. Do your best. Your Venn Diagram will be graded. The next slide will show you how to set up your diagram.

Page 37: Physical and Chemical and Weathering. Name three causes of physical weathering.

ChemicalPhysical

List differences in the circles where they don’t overlap. List similarities inside the area where the circles do

overlap.


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