Review It Quiz Geologic Time Scale

Earth is supposedly how old?

• 46 billion years

• 4.6 million years

• 4.6 billion years

• 4600 years

In which era were mammals dominant?

• Mesozoic

• Precambian

• Cenozoic

• Paleozoic

Which is the longest time period in the geological time scale?

• Period

• Era

• Epoch

• Eon

Which is the correct order of eras from oldest to youngest

• Cenozoic, Mesozoic, Precambrian, Paleozoic

• Mesozoic, Cenozoic, Paleozoic, Precambrian

• Precambrian, Paleozoic, Cenozoic, Mesozoic

• Precambrian, Paleozoic, Mesozoic, Cenozoic

Which time period covered more than 80% of Earth's history?

• Paleozoic

• Cenozoic

• Precambrian

• Mesozoic

Which is known as the age of the dinosaurs?

• Cenozoic

• Palaezoic

• Mesozoic

• Precambrian

What era are we currently in?

• Cenozoic

• Palaezoic

• Mesozoic

• Precambrian

What happened during the "Cambrian explosion"?

• There was a major increase in the number and diversity of invertebrate species in a short period of time.

• Mammals began to dominate the Earth

• An asteroid caused a mass extinction

Which came first?

• The age of reptiles

• Early humans arise on Earth

• Amphibians leave the water

• Trilobites are one of the dominant species on Earth

Write down one question you have about this topic.