Earth History Test

How old is the earth?
4.6 Million Yrs
46 Billion Yrs
4.6 Billion Yrs
Around 4.6 Billion Yrs
About how long have organisms existed?
4.6 Billion Yrs
2.9 Billion Yrs
3.8 Billion Yrs
2016 Yrs
How long have humans like modern day existed?
About 6 Million Yrs
About 200,000 Yrs
2016 Yrs
About 385,000 Yrs
What era is the "Age of the Mamals"?
Paleozoic
Cenozoic
Mesozoic
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