Geologic time scale

The largest unit of the geological time scale is ........

• Era

• Period

• Eon

• Unit

Eons are divided into .......... .

• eras

• eons

• epochs

• periods

Earth is thought to be formed ______ years ago?

• 200 thousand

• 4.6 billion

• 3 million

• 13.8 billion

What Era are we currently living in?

• Paleozoic Era

• Mesozoic Era

• Hadean Eon

• Cenozoic Era

What Eon represents 88% of Earth's history.

• Mesozoic

• Precambrian

• Paleozoic

• Cenozoic

What is the "Age of Mammals"

• Precambrian Eon

• Mesozoic Era

• Cenozoic Era

• Ice Age

What was the "Age of Reptiles/Dinosaurs"

• Ice Age

• Mesozoic Era

• Precambrian Era

• Precambrian Eon

What is the name of the supercontinent that separated in the Mesozoic Era?

• Pangea

• Africa

• League of Nations

• United Nations

In which eon do we know there was no life?

• Carboniferous

• Hadean

• Miocene

• Tithonian

When did the formation of the earth occur?

• Hadean

• Archean