Geologic Time Scale

Which period are we currently in?

• Quaternary
• Holocene
• Jurassic
• Tertiary

Which era is the longest?

• Cenozoic
• Cambrian
• Precambrian
• Phanerozoic

The geologic time scale is a record of....

• the history of fossils only
• the history of rocks
• the history of rock layers and fossils
• geologist notes

Paleontologists infer that the earth is approximately how many years old?

• 4.5 million years
• 450 million years
• 450 billion years
• 4.5 billion years

A unit of geologic time that subdivides eras

• period
• time span

The Triassic Period, the Jurassic Period, and the Cretaceous Period occurred in what era?

• Cenozoic
• Mesozoic

 The Quaternary period, where humans first appeared, is in the Mesozoic era.

• True
• False

Which era or portion of the timeline is known as the "Age of Mammals"?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Which era or portion of the timeline is known as the "Age of Dinosaurs"?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Place the following in order starting with the OLDEST
1  Paleozoic
2  Cenozoic
3  Precambrian
4  Mesozoic

• 1 3 2 4 
• 3 1 4 2
• 4 3 2 1 
• 2 3 1 4