Geologic Time

Which Era was mainly dominated by dinosaurs?

• Cenozoic

• Jurassic

• Mesozoic

• Paleozoic

Which Era has the most complex organisms?

• Cenozoic

• Mesozoic

• Paleozoic

• Quaternary

Which Era occurred last (most recent)?

• Cenozoic

• Mesozoic

• Paleozoic

Which period is closest to present day?

• Cambrian

• Devonian

• Triassic

• Tertiary

How many years ago did the Mesozoic Era begin?

• 245 years

• 245 million years

• 65 years

• 65 million years

Which organisms are the most recent (closest to present day)?

• primitive reptiles

• giant insects

• primitive horses

• brachiopods

How old do Paleontologists believe the Earth is?

• 2019 years old

• 3.6 billion years old

• 4.6 billion years old

• 4.6 million years old

Mammals are a dominant group in which era?

• Cenozoic

• Mesozoic

• Paleozoic

• Cambrianozoic

What era did the formation of the earth occur?

• Paleozoic

• Precambrian

• Cenozoic

• Cambrian

What type of event usually marks the end of an Era

• A Mass Extinction

• A Quinceanera

• An earthquake

• A Volcanic Eruption