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EXOGENIC PROCESSES  EXOGENIC PROCESSES take place at or near the earth’s surface that makes the surface wear away Exogenic processes are very destructive. responsible for degradation and sculpting the earth’s surface  EXOGENIC PROCESSES a. weathering b. erosion c. sedimentation/deposit...

EXOGENIC PROCESSES  EXOGENIC PROCESSES take place at or near the earth’s surface that makes the surface wear away Exogenic processes are very destructive. responsible for degradation and sculpting the earth’s surface  EXOGENIC PROCESSES a. weathering b. erosion c. sedimentation/deposition d. mass wasting  a. weathering process that breaks down rock into smaller pieces a. physical weathering rock is physically broken down into smaller pieces b. chemical weathering breaking down rock through chemical changes c. biological weathering caused by movements of plants and animals  Physical Weathering Disintegration and decay of rocks via weather elements: high temperatures, extreme cold and freeze-thaw cycles No change in chemical composition of rocks Exfoliation – due to thermal expansion/contraction and/or release of pressure when buried rocks are uplifted and exposed  Physical Weathering Granular disintegration happens when the grains of a rock become loosened and fall out, leaving a pitted, uneven surface due to changing temperatures  Physical Weathering Exfoliation mechanism in which large flat or curved sheets of rock are broken and separated from the outcrop due to the release of pressure.  Chemical Weathering Oxidation – important in iron-rich rocks – reddish coloration like rust Hydrolysis – igneous rocks have much silica which readily combines with water Carbonation and Solution – carbon dioxide dissolved in water reacts with carbonate rocks to create a soluble product (calcium bicarbonate)  Biological Weathering §Roots physically break or wedge rock §Lichens (algae and fungi living as single unit), remove minerals and weaken rock by releasing acids §Burrowing animals can increase weathering. Classify the following as PW (physical weathering) CW (chemical weathering), or BW (biological weathering) cw 1. carbonation bw 2. plants pw 3. block disintegration cw 4. hydration pw 5. exfoliation bw 6. animals cw 7. solution bw 8. humans cw 9. oxidation pw 10.frost weathering  b. erosion rock particles are carried away by wind, ice, and gravity. Weathering causes the rocks to break down. Erosion (water) or transportation moves the sediments downhill to other places.  b. erosion Flowing Water – Fluvial Morphology Humid regions: Perennial streams and entrenched channels, rapids, waterfalls, plunge pools, potholes, meandering streams, bank erosion, oxbow lakes, etc.  b. erosion Wind – Aeolian Landscapes deflation hollows, ventifacts, Yardang, etc Tides and Waves – Coastal Morphology Sea cliffs, sea caves, sea arches, sea stacks, wave-cut beaches, etc.. Moving Ice – Glacial Morphology glacial troughs (U-shaped valleys), hanging valleys, glacial lakes,. b. erosion (wind) b. erosion (tides and waves) b. erosion (moving ice) Types of glaciers ice shelves ice valley or alpine c. sedimentation/deposition a natural process in which a material is carried to the bottom of bodies of water and forms to solid  c. sedimentation/deposition stream loads a. suspended load b. bed load c. dissolved load https://docs.google.com/forms/d/e/1FAIpQLSd7QVOYmSuoyoK5r2JdNlpTln4usN27JOPBb1kMY2 nekhzjYA/viewform?usp=sf_link  d. mass wasting the downward movement of a rock, soil and regolith due to the action of gravity triggered by the following factors: over- steepened slope, water, earthquake, and vegetation removal.  d. mass wasting Solifluction slow, downward movement of water- saturated soil and sediment, often occurring in areas with permafrost characterized by the flow of soil down a slope, typically in a saturated condition. d. mass wasting