📌📌60. Geologic Time Scale Learning Objectives

Describe the major events that occurred during each era and how these events have shaped the Earth's geologic history.

• The major events of each era have shaped Earth's geologic history by causing mass extinctions, the formation of continents, and the evolution of life.

• The major events of each era have only affected the weather patterns on Earth.

• The major events of each era have had no impact on Earth's geologic history.

• The major events of each era have only influenced the movement of the oceans.

The significance of geological time scale is:

• It helps in understanding the sequence and age of events in Earth's history.

• It measures the distance between continents.

• It predicts future earthquakes.

• It explains the weather patterns.

When did the Geological Time Scale begin? Fill in the blank: The Geological Time Scale began when ______ was formed.

• Earth

• The Moon

• Mount Everest

• The Grand Canyon

Geologic time has not ended.

• True

• False

What is the longest unit of geologic time?

• Era

• Period

• Eon

• Epoch

Eras are divided into _______. (At the end of each era a mass extinction occurred)

• periods

• epochs

• centuries

• ages

Periods can be further divided into what?

• Eons

• Epochs

• Eras

• Ages

What is the shortest division of geological time?

• Era

• Period

• Eon

• Epoch

We are currently in the _______ Era, the Quaternary Period, and the Holocene Epoch.

• Cenozoic

• Mesozoic

• Paleozoic

• Proterozoic

We are currently in the Cenozoic Era, the _______ Period, and the Holocene Epoch.

• Quaternary

• Jurassic

• Triassic

• Permian