Following the devastation of End Permian came 'the age of reptiles'; this really covered the entire _________ Era, right up to the extinctions at End Cretaceous. A. Triassic B. Mesozoic C. Phanerozoic

Match the time frame listed on the left with the characteristic listed on the right.End of the Paleozoic eraEnd of the Mesozoic eraMesozoic era?Age of the dinosaurs?Most of Earth a desert?A layer of iridium deposited all over Earth

Which of the following is the current era?A.PaleozoicB.PrecambrianC.MesozoicD.Cenozoic

What happened at the end of both the Mesozoic and Paleozoic eras?A.There were major asteroid impacts.B.An ice age occurred.C.A supercontinent broke up.D.There were mass extinctions.

The ______ era had many extinctions because of large variations in climate.A.PrecambrianB.PaleozoicC.CenozoicD.Mesozoic

Which is a description of the Paleozoic era?A.The era of humansB.The age of the dinosaursC.The hottest eraD.The rise of lif