G9 Geologic Time Scale Review

What is the name of the era during which the evolution of humans occurred?

• Mesozoic

• Paleozoic

• Cenozoic

• Proterozoic

During which period did the extinction of dinosaurs occur?

• Jurassic

• Triassic

• Cretaceous

• Devonian

Which event is associated with the Devonian period?

• First amphibians

• First reptiles

• First flowering plants

• First birds

What method helped determine the absolute divisions in the geological time scale?

• Carbon dating

• Radioactive dating

• Fossil analysis

• Rock layer examination

What are "periods" further divided into?

• Epochs

• Eras

• Eons

• Decades

Which of the following is NOT one of the eons mentioned in the learning material?

• Cryptozic (Precambrian)

• Phanerozoic

• Paleozoic

• None of the above

What is each period further classified into?

• Epochs

• Ages

• Centuries

• Eras

Why have most sections of Earth's history been divided?

• Due to the discovery of new minerals

• Because of the development or extinction of major organisms

• As a result of volcanic eruptions

• Due to changes in Earth's orbit

Which of the following organisms first appeared during the Cryptozoic eon?

• Dinosaurs

• Mammals

• Bacteria, algae, protozoa

• Birds

During which time period did the Archean era occur?

• 2500 million years ago – 4600 million years ago

• 2000 million years ago – 4000 million years ago

• 1500 million years ago – 3500 million years ago

• 1000 million years ago – 3000 million years ago