Rocks

• the layers of the earth (km)

  • inner core- solid 6378 thick
  • outer core- liquid 5100 thick
  • mantle- solid 2900 mantle
  • asthenosphere- top of mantle
  • crust- soild 0-100 thick
  • lithosphere- crust and uppermost mantle 


  the layer of earth

  
• sedimentary rocks are rock that are produced from the deposition of sediments. Has fossils and many layers

  • example- sandstone
• metamorphic rocks are rocks that have undergone change from intense pressure and heat

  • example marble
• igneous rocks are cooled magma from volcanos

  • example- granite
• Biological weathering


  Caused by the movements of plants and animals
• Chemical weathering


  Involves the interaction of rock with mineral solutions (chemicals) to change the composition of rocks
• Physical weathering

  Occurs when physical processes affect the rock, such as changes in temperature or when the rock is exposed to the effects of wind, rain and waves