I am doing a geologic time scale for class and comparing it to a soccer field that is 120 yards. Here are the questions. The math part is giving me a headache. Some Important Dates in the History of the Earth 1) Origin of the earth – 4,600,000,000 years ago 2) Oldest rocks one earth – 4,000,000,000 years ago 3) First eukaryotic cells – 2,100,000,000 years ago 4) First Metazoans – 635,000,000 years ago 5) End of the PreCambrian – 542,000,000 6) First Land Animals – 428,000,000 7) End of Mesozoic – 66,000,000 8) Earliest humans – 2,000,000 9) End of the Ice Age – 11,700 years ago 10) My birthday – June 9, 1992
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