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Good Morning!. Warm-Up: What are constructive and destructive geological forces? (think about processes in the rock cycle ) Today: Geological forces study guide Test Review. Constructive and Destructive Forces. Processes That Act Upon Earth’s Surface Features.

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  1. Good Morning! • Warm-Up: What are constructive and destructive geological forces? (think about processes in the rock cycle) Today: Geological forces study guide Test Review

  2. Constructive and Destructive Forces Processes That Act Upon Earth’s Surface Features SOURCE: https://teacherweb.com/LA/.../Constructive-and-Destructive-Forces.ppt

  3. What are Constructive and Destructive Forces? • Constructive Force • A constructive force is a process that raises or builds up the surface features of the Earth. • Destructive Force • A destructive force is a process that lowers or tears down the surface features of the Earth.

  4. Surface features are landforms and bodies of water that cover the Earth’s surface such as: mountains valleys canyons gorges beaches sand dunes barrier Islands flood-plains moraines and drumlins volcanoes oceans lakes rivers What Are Surface Features?

  5. How Can a Surface Feature be Changed by a Constructive Force? • Natural forces such as wind, water, ice, through the process of deposition. • Deposition is the process of dumping sediment, dirt, rocks, or particles in one place. • The movement of the Earth’s crust through Plate Tectonics

  6. Constructive ForceExamples of Deposition • Deltas • Floodplains • Beaches and Barrier Islands • Deposition • Sand dunes • Moraines and drumlins

  7. Deltas Floodplains http://thebritishgeographer.weebly.com/river-landforms.html http://stockarch.com/files/12/06/river_delta.jpg

  8. Beaches and Barrier Islands Sand dunes http://i2.cdn.turner.com/cnn/dam/assets/130530161523-100-beaches-crane-beach-horizontal-gallery.jpg http://www.ehp.qld.gov.au/images/wildlife-ecosystems/dunes.jpg http://10mosttoday.com/wp-content/uploads/2013/08/Erg_Chebbi_dunes.jpg http://www.beg.utexas.edu/coastal/thscmp/images/environment_1.jpg

  9. Moraines and drumlins http://glacierchange.files.wordpress.com/2012/05/deming-glacier-terminus-20072.jpg http://www.geo-logic.org/Glacial%20Geology/cd33022%20drumlin%20example001,%20www.royalalbertmuseum.ca.gif http://isgs.illinois.edu/sites/isgs/files/images/form-moraine.gif

  10. Other Constructive Forces • Folding • Mountains • Faulting • Mountains • Trench • Fault • Earthquake • Mountains Islands • Volcanic Activity

  11. Folding http://strike-slip.geol.ucsb.edu/KESSEL/palmdaleroadcut.html http://3.bp.blogspot.com/_LxLfmghofGc/TUxh15RlTWI/AAAAAAAADGw/bxIGzYCZxVQ/s400/Folding_Gasteretal-Alps.jpg

  12. Faulting http://www.minimegeology.com/shop/wpimages/Fault_photo.jpg http://www.labnews.co.uk/wp-content/uploads/2006/07/san_andreas_fault.jpg

  13. How Can a Surface Feature be Changed by a Destructive Force? • Physical or Chemical Weathering • Weathering is the breaking down of rock into sediment. • Natural forces such as wind, water, ice, through the process of erosion. • Erosion is the movement of sediment from one place to another.

  14. Changing the Earth’s Surface by a Destructive ForceExamples of Weathering • Mechanical / Physical Weathering • Temperature Change-Freezing and thawing of Rock • Ice Wedging-Water freezing and expanding in cracks of rock • Impact of organisms • Root Pry • Animals burrowing • Chemical Weathering • Oxidation / rusting • Carbonic Acid / acid rain • Caverns • Impact of organisms • Secretion of acid from Lichen

  15. Destructive ForceExamples of Erosion • Canyons, Gorges, V-Shaped Valleys • Sea Arches, • Sea Stacks • Erosion • Buttes, Desert • U-Shaped Valleys • Mudslide, Sinkholes

  16. Other Destructive Forces • Volcanic Activity • Movement of Earths Crust (Plate tectonics) • Reshaping of Mountains • Earthquakes • Movement of Earths Crust (Plate tectonics) • Trenches • cracks in the Earth Curst

  17. Now What? • With the rest of the period, • Get a mini and continue the OAKS Review Power point OR • Work on the Review for Friday’s Rocks, Minerals and Fossils Test

  18. OAKS Test Review • Go to Mrs. Ellis’s website • Click on 4th Period • Scroll to the bottom of the page • Find Monday, 5/5/14 and click on the link • Go through the slides and answer in your notebook.

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