Classify each event in the history of life into the appropriate eon or era. Drag each phrase to the appropriate bin. The age of fossils can sometimes be determined by radiometric dating, which is based on the constant rate of decay of radioactive isotopes. The time required for half of a radioactive
The following events are classified into appropriate era
Hadean eon – Origin of earth
Archaean eon – Oldest fossils of cells (prokaryotes)
Proterozoic eon – Oldest
fossils of eukaryotic cells appear.
Paleozoic era – The cambrian explosion, First tetrapods
and insects appear.
Mesozoic era – Dinosaurs evolve and radiate, Origin of
Cenozoic era – Humans appaer, Major radiation of
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What is the mass of 9.44*10^24 molecules of NO2: The molar mass is 46.01g/mol?
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