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Major Events in Geologic Time (Grade 10)

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Major Events in Geologic Time

Order the major events in Earth's history from 1, earliest, to 15, the most recent.


           Age of Amphibians

           Early hominids appear

           One-celled organism appear

           Formation of the Earth

           Mass extinction of mammals at end of last ice age

           Early mammals and dinosaurs appear

           Cambrian explosion

           Supercontinent Pangaea beings to break apart

           Age of oldest known rocks

           Mammals diversify and flourish

           Permian-Triassic mass extinction

           Present Day

           Earliest life on land

           Sponges and other multi-celled animals appear

           Cretaceous-Tertiary mass extinction
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