Geologic Time Scale Questions

How long has the tale of life on Earth been unfolding?

• About 10 billion years

• About 1 million years

• About 4 billion years

• About 500 million years

Who published the first laws of stratigraphy in 1669?

• Nicolas Steno

• William Smith

• Giovanni Arduino

• Charles Darwin

What does the Geologic Time Scale (GTS) help scientists understand?

• The full expanse of time and history of life on Earth

• The age of human civilizations

• The future predictions of Earth's climate

• The distance between planets

What marked the beginning of the Archean Eon?

• The appearance of cyanobacteria

• The cooling of the Earth's crust

• The extinction of dinosaurs

• The formation of the moon

What major event occurred 252 million years ago?

• The formation of Pangea

• The K-Pg Extinction Event

• The Cambrian explosion

• The Great Dying

What era is often called the Age of Reptiles?

• The Mesozoic Era

• The Paleozoic Era

• The Cenozoic Era

• The Archean Eon

What significant change occurred during the Proterozoic Eon?

• The first appearance of multicellular life

• Photosynthetic bacteria increased oxygen in the atmosphere

• The first land plants appeared

• The first amphibians evolved

What is the name of the eon that we are currently in?

• The Phanerozoic Eon

• The Proterozoic Eon

• The Archean Eon

• The Hadean Eon

What era marks the rise of mammals?

• The Paleozoic Era

• The Mesozoic Era

• The Proterozoic Eon

• The Cenozoic Era

What was the major cause of the K-Pg Extinction Event?

• A global pandemic

• A massive volcanic eruption

• A sudden ice age

• A giant asteroid impact