when was earth born
GLOBIO Traveling Teacher says:
Hi Ariana,
Scientists testing rocks believe that Earth, and the rest of the solar system, began to form about 4.5 billion years ago in a giant cloud of dust and gas. Over time, dust particles began to clump together. It probably took the clump that became Earth tens of millions of years to reach its current size. The young Earth had no water, no atmosphere, and no life-forms.
A little over 3.5 million years ago life started to appear on the new Earth.
You can read more about the Earth on Glossopedia:
http://www.globio.org/glossopedia/article.aspx?art_id=55&art_nm=Earth
Thanks for the great question,
GLOBIO Traveling Teacher
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