structure of the earth

• two parts of core

  inner

  outer
• outer core

  • semi-molten
  • contains lots of iron and nickel
• inner core

  • solid ball
  • 6000 degrees
  • contain iron and nickel
• mantle

  • 1000 - 3500 degrees
  • rigid
  • made from silicate rocks
• lithosphere

  crust + top part of mantle together
• where does earth's main source of internal energy come from?

  Radioactive decay e.g uranium