Weathering, Erosion, Mass Wasting.

14,180 views

Published on

this presentation is all about weathering, erosion, & mass wasting. this may be simple, but it is good for the eyes, and the information is short but complete. :))

Published in: Technology, Education
1 Comment
10 Likes
Statistics
Notes
  • helpful presentation.... thank you very much for your effort.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total views
14,180
On SlideShare
0
From Embeds
0
Number of Embeds
26
Actions
Shares
0
Downloads
516
Comments
1
Likes
10
Embeds 0
No embeds

No notes for slide

Weathering, Erosion, Mass Wasting.

  1. 1. WEATHERING, SOIL, AND MASS WASTING <br />
  2. 2. DIFFERENCIATING EXTERNAL PROCESSES & INTERNAL PROCESSES<br />External process- processes that occur at or near Earth’s surface and powered by the energy from the Sun<br />Internal Process- processes that occur underneath the Earth’s surface and derives its energy from Earth’s interior<br />
  3. 3. THREE EARTH’SEXTERNAL PROCESSES<br />Weathering<br />Mass Wasting<br />Erosion<br />
  4. 4. WEATHERING<br /><ul><li>the physical breakdown & chemical decomposition of rocks
  5. 5. part of the rock cycle
  6. 6. considered as a preparation for erosion
  7. 7. rocks are damaged physically and/or chemically</li></li></ul><li>
  8. 8. AGENTS OF WEATHERING:<br />change of the environment<br />Water<br />air/wind<br />human activities<br />chemical substances<br />
  9. 9. KINDS OF WEATHERING<br />Mechanical Weathering<br />Chemical Weathering<br />
  10. 10. MECHANICAL WEATHERING<br /><ul><li>rock is broken to smaller pieces without changing its chemical composition
  11. 11. increases the amt. of surface available for chemical weathering
  12. 12. results in smaller pieces from a single large one</li></li></ul><li>4 PROCESSES OF MECHANICAL WEATHERING<br />Frost Wedging- caused by the freezing and thawing of water that seeps into cracks of rocks<br />Abrasion- caused by the rubbing and/or bouncing of rocks with each other<br />Exfoliation/Unloading- peeling away of large sheets of loosened materials in the rock<br />
  13. 13. d. Biological Activities- caused by an organism’s activity such as plants, burrowing animals & humans<br />
  14. 14. FROST WEDGING<br />ABRASION<br />EXFOLIATION<br />
  15. 15. CHEMICAL WEATHERING<br />- rock is broken down by chemical action resulting in the change of the composition of the rock<br />AGENTS: <br />Oxygen 3. carbon dioxide<br />Rainwater 4. acids produced by decaying organisms<br />
  16. 16. 2 PROCESSES OF CHEMICAL WEATHERING<br />Oxidation- mineral is interacted chemically by oxygen<br />Hydration- mineral is interacted chemically by water<br />Carbonation- mineral is interacted chemically by carbon dioxide or carbonic acid<br />
  17. 17. BAUXITE- COMBINATION OF OXYGEN, HYDROGEN & ALUMINUM<br />HEMATITE FORMED BY OXIDATION<br />
  18. 18. EROSION<br /><ul><li>physical removal of the material
  19. 19. transporting of the rock from one place to another</li></ul>AGENTS:<br />Wind<br />Water<br />Ice<br />
  20. 20. SHEET AND WIND EROSION<br />Sheet erosion- soil is removed by thin sheets of water<br />Wind erosion- caused by wind and only very significant during windy days or during a drought<br />
  21. 21.
  22. 22. RILLS AND GULLIES<br />Rills- narrow incision of soil caused by overland flow<br />Gully- landform created by running water which sharply eroded the land, typically on a hillside<br />
  23. 23. G<br />U<br />L<br />L<br />Y<br />R<br />I<br />L<br />L<br />S<br />
  24. 24. MASS WASTING<br /><ul><li>Movement of rock, regolith & soil under the direct influence of gravity
  25. 25. The step that follows weathering</li></li></ul><li>AGENTS OF MASS WASTING:<br />Gravity- main controlling force<br />Trigger- initiates downslope movements<br />Water- heavy rains, snowmelt<br />Over steepened Slopes<br />Removal of Vegetation<br />6. Natural Calamities<br />
  26. 26. MOTION TYPES OF MASS WASTING<br />1. fall- slopes which are too steep (ex. Rockfall)<br />2. Slides- materials remain fairly & coherent & moves along a well defined surface (ex. Landslide)<br />3. Flow- moves downslope as a vicious FLUID (ex. Mudflow)<br />4. Slump- downward sliding of a mass<br />
  27. 27. A<br />V<br />A<br />L<br />A<br />N<br />C<br />H<br />E<br />R O C K F A L L<br />L<br />A<br />N<br />D<br />S<br />L<br />I<br />D<br />E<br />
  28. 28. THE END <br />
  29. 29. BIBLOIGRAPHY:<br />Tarbuck, Edward and Lutgens, Frederick. Earth Science: Basic Principles and Concepts, Pearson Education South Asia Pte Ltd. 23-25 First Lok Yang Road, Jurong Singapore<br />http://www.regentsprep.org<br />http://www.google.com<br />http://images.google.com.ph/imghp?hl=en&tab=wi<br />
  30. 30. THANKS FOR WATCHING! <br />By: Russel Christine Corcino<br />MSU-IIT IDS<br />

×