Smarty Pants Quiz
09
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Which era did dinosaurs first appear?
Neoproterozoic
Mesozoic
Cenozoic
Eoarchean
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Dinosaurs first appeared about 240 million years ago at roughly the beginning of the Mesozoic Era. Scientists divide the Mesozoic Era into three periods: the Triassic, Jurassic, and Cretaceous.
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09
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Which era did dinosaurs first appear?
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