Earths Internal Energy

• How to Measure heat within the Earth

  Mines, Boreholes
• Why is the interior of the earth hot

  1/3 - Processed that formed the Earth

  2/3 Radioactive Decay
• Accretion


  Gravitation attraction of material to the growing Earth
• During Impacts, gravitational potential energy was released and transferred into thermal energy
• It was possible that early earths temp was hot enough to have a magma ocean
• Rock that makes the planet a good heat insulator - heat from accretion was mainly kept below the Earths Surface