rock cycle

• rock cycle

  
• the rocks on earth are always changing due to many different processes
• there are three main type of rock, with crock changing in between for millions of years
• this rock recycling process is called the rock cycle
• the rocks on earth do not stay the same
• rocks are changing due to weathering
• weathering breaks down the surface of earths rocks
• 3 types of weathering

  biological, chemical and physical
• biological

  broken up roots of plants or animals burrowing
• chemical weathering

  broken by substances like rainwater, sea water, rivers or air
• physical weathering


  being broken by changes in temperature; freezing and thawing
• erosion


  erosion is the process of moving small pieces of rock formed by weathering. Erosion occurs from the action of wind or water.