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How was earth formed ?

How was earth formed ? (Arun asked)

Answer:

Earth formed around 4.54 billion years ago. The earth was formed in the same way as the sun, planets, stars. At first the earth was a hot glowing ball of white hot gases with a temperature that was millions of degrees Fahrenheit. This was caused by particles of gases being drawn together and compressed, giving off a lot of heat. 

Please refer to the following links for detailed information.

  1. http://www.bobthealien.co.uk/earthform.htm
  2. http://en.wikipedia.org/wiki/History_of_the_Earth
  3. http://upload.wikimedia.org/wikipedia/commons/7/77/Geologic_Clock_with_events_and_periods.svg
  4. http://www.history.com/shows/how-the-earth-was-made/videos#the-age-of-earth