october 2, 2012
DESCRIPTION
October 2, 2012. Warm Up: Finish coloring and homework comics. Turn in Homework to the bin. . Today:. We will explain the changes on Earth’s surface and be able to determine how rocks provide valuable information about Earth’s crust . - PowerPoint PPT PresentationTRANSCRIPT
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October 2, 2012Warm Up:
Finish coloring and homework comics.
Turn in Homework to the bin.
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Today:
• We will explain the changes on Earth’s surface and be able to determine how rocks provide valuable information about Earth’s crust.
• You will work with a partner to describe, explain and identify various examples of how Earth’s surface changes through natural and chemical processes.
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The Basics…• WEATHERING: The breakdown of rocks
• MECHANICAL weathering = the natural and physical breakdown of rock
• CHEMICAL weathering = the breakdown of rock by chemical reactions – Acid precipitation
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MECHANICAL WEATHERING• Erosion: Movement of sediment by wind, water, glaciers and gravity
• WATER! Major agent of erosion– Rivers– Oceans
• Freeze/Thaw: water freezes and expands, thaws and rocks break apart
• Plants: roots may grow into tiny cracks in rocks and exert force, breaking the rock
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Test It…• You will see a series of pictures. • One partner will look at the picture and describe it to
his/her partner. • The partner will write down what Earth process they
believe is represented by the picture. *NOT giving answers here!– IE: erosion by water; chemical weathering; etc…
• Then, partners switch positions. Repeat!• I will reward the partnership with the most correct
answers!
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PARTNERS SWITCH!
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Were You Right?!
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EROSION BY WATER
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CHEMICAL WEATHERING
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EROSION BY WATER
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MECHANICAL BY FREEZE-THAW
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MECHANICAL BY PLANTS
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EROSION BY WIND
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EROSION BY WIND
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EROSION BY WATER
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EROSION BY WATER
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MEHCANICAL BY PLANTS
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CHEMICAL WEATHERING
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MEHCANICAL BY FREEZE-THAW
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Game• 3 teams of 7• You will relay breaking down the landform
(weathering), carry it across crab-style (erosion), deposit to make another landform (deposition)
• First team finished wins!!
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Be prepared for a quiz on rocks and Weathering tomorrow!!