ELS_LESSON 1

• Exogenic processes


  Processes that happen on the earth's surface, including weathering, erosion, and deposition
• Earth's surface


  • Composed of water and landmasses
  • Solid portion made of rocks and minerals that can experience physical or chemical changes
• Exogenic processes


  1. Weathering

  2. Erosion

  3. Deposition
• Weathering


  The process of disintegration and decomposition of rocks
• Weathering


  • Important in the formation of soil
  • Soil is a mixture of grains, organic matter, H2O, and gas
• Types of weathering


  • Chemical
  • Physical
• Mechanical/physical weathering


  The breakdown of rocks into pieces without any change in composition
• Factors causing mechanical/physical weathering

  • Pressure
  • Temperature
  • Frost wedging
  • Abrasion
  • Organic activity
  • Human activities
  • Burrowing animals
• Chemical weathering


  Changes in the composition of rocks due to chemical reactions
• Erosion


  The separation and removal of weathered rocks due to different agents like water, wind, and glacier, causing transportation of the material to where they are deposited
• Mass wasting


  The movements of sediments downslope under the influence of gravity, including fall, slide, avalanche, and flow
• Deposition


  The process in which the weathered materials carried out by erosion settle down in a particular location, typically but not always in water
• Plants, animals, and humans play an important role in the erosional process
• Exogenic processes


  Processes that happen on the earth's surface, including weathering, erosion, and deposition
• Earth's surface


  • Composed of water and landmasses
  • Solid portion made of rocks and minerals that can experience physical or chemical changes
• Weathering, erosion, and deposition

  Weathered materials are transported by different agents and settle in particular areas
• Weathering


  The process of disintegration and decomposition of rocks
• Weathering


  • Important in the formation of soil
  • Soil is a mixture of grains, organic matter, water, and gas
• Types of weathering


  • Chemical
  • Physical
• Mechanical/physical weathering


  Breakdown of rocks into pieces without change in composition
• Chemical weathering


  Changes in the composition of rocks due to chemical reactions
• Erosion


  Separation and removal of weathered rocks due to agents like water, wind, and glacier, causing transportation of material to where they are deposited
• Mass wasting


  Movements of sediments downslope under the influence of gravity, including fall, slide, avalanche, and flow
• Deposition


  Process in which weathered materials carried by erosion settle down in a particular location, typically but not always in water
• Plants, animals, and humans play an important role in the erosional process