Reading: The Four Major Eras

What are the four major eras of the Geologic Time Scale?

• Precambrian, Paleozoic, Mesozoic, Cenozoic

• Precambrian, Paleozoic, Jurassic, Cenozoic

• Precambrian, Triassic, Mesozoic, Cenozoic

• Precambrian, Paleozoic, Mesozoic, Neolithic

During which era did the Cambrian Explosion occur, leading to a rapid increase in the diversity of life?

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

• Precambrian Time

Which era is often referred to as the 'age of the dinosaurs'?

• Mesozoic Era

• Paleozoic Era

• Cenozoic Era

• Precambrian Time

What significant event marks the end of the Mesozoic Era?

• A mass extinction event likely caused by a meteor impact or volcanic activity

• The Cambrian Explosion

• The formation of the Himalayas

• The emergence of humans

Which era saw the rise of mammals as the dominant life forms following the extinction of the dinosaurs?

• Cenozoic Era

• Mesozoic Era

• Paleozoic Era

• Precambrian Time