URGENT LEARNING

• Abrasion - The power of the water hits the rocks in the water against the sea/ river bed wearing it
• Hydraulic action - The force of the water pushes air into the cracks on the coast and river banks, causing it to weaken and wear away
• Attrition - The water causes the rocks and pebbles in the water to crash into each other, breaking them up and creating smaller, smoother pebbles
• Solution - soft rocks and minerals dissolve in the water
• • Stack
  • Starts with small cracks in rock
  • Hydraulic action widens the crack making a cave
  • cave keeps Getting widend by erosional processes -
  • when its really big, it can erode all the way, this makes arches - Arches collapses when it gets to big, forms a Stack - Stack erodes down into a stump
• Chemical - breaking rocks apart without changing their chemical composition
• Mechanical - The erosion or disintegration of rocks building materials - caused by chemical reactions

   
• Biological - The weathering and subsequent disintegration of rocks by plants, animals and microbes
• Weathering is the alteration and breakdown of rock when they are exposed to the atmosphere. Weathering processes occur in situ, this is, in the same place, with no major movement of rock materials involved, whereas erosion is moving
• Erosion is the breaking down of rocks by water frozen or fluid - a moving force invlved