1. Earth's Structure

• Crust

  • outside layer
  • solid rock
  • 60km under continents, 10km under ocean
  • floats on magma
• Mantle

  • surrounds the core
  • 4,000*C
  • molten rock - magma
• magma - molten rock that is under the earth's surface
• core

  • made of nickel and iron
  • inner core is solid
  • outer core is molten
• techtonic plates - plates that move past each other, creating earthquakes and volcanoes
• plate boundary - where two plates meet and move apart
• oceanic plates - plates under the ocean
• continental plates - the plates that make up the continents.
• convection currents - currents of hot magma that move around the earths mantel