Geologic Time Quiz

What is the field of study that involves the structure and history of Earth?

• Astronomy

• Chemistry

• Geology

• Biology

Approximately how old are the oldest rocks found on Earth?

• 5 billion years

• 4 billion years

• 3 billion years

• 2 billion years

What is the name of the eon that covers the time from the formation of Earth's crust to the beginning of the Phanerozoic eon?

• Mesozoic

• Cenozoic

• Paleozoic

• Precambrian

During which eon did the first living organisms, such as bacteria, appear?

• Phanerozoic

• Proterozoic

• Cenozoic

• Archaean

Which era is known as the Age of Reptiles?

• Cenozoic

• Mesozoic

• Paleozoic

• Precambrian

What major event is believed to have occurred during the Mesozoic era?

• Formation of the Grand Canyon

• Formation of the Himalayas

• Breakup of Pangaea

• Formation of Pangaea

Which era is referred to as the Age of Mammals?

• Paleozoic

• Precambrian

• Mesozoic

• Cenozoic

What is the name of the period that lasted from about 65.5 million years ago to about 23 million years ago?

• Neogene

• Triassic

• Paleogene

• Quaternary

During which period did the first human ancestors appear?

• Quaternary

• Cretaceous

• Neogene

• Paleogene

What natural feature was formed by glaciers during the Quaternary period?

• The Himalayas

• The Alps

• The Grand Canyon

• The Great Lakes