MMS3443 Topic 6

What are the four major divisions of the geological time scale?

• Hadean, Archean, Proterozoic, Phanerozoic

• Ordovician, Silurian, Devonian, Carboniferous

• Paleozoic, Mesozoic, Cenozoic, Quaternary

• Precambrian, Paleozoic, Mesozoic, Cenozoic

Which era spans from approximately 4.6 billion years ago to 541 million years ago?

• Precambrian

• Cenozoic

• Mesozoic

• Paleozoic

What significant event occurred during the Paleozoic era?

• Diversification of complex life forms

• Emergence of mammals

• Formation of the Earth

• Mass extinction of dinosaurs

Which mass extinction event is known for wiping out approximately 96% of all marine species?

• Ordovician-Silurian

• Permian-Triassic

• Triassic-Jurassic

• Cretaceous-Tertiary

During which era did dinosaurs rise to prominence?

• Precambrian

• Paleozoic

• Cenozoic

• Mesozoic

What is the estimated percentage of species that went extinct during the Cretaceous-Tertiary extinction event?

• 25%

• 90%

• 75%

• 50%

Which extinction event is considered the most severe in Earth's history?

• Ordovician-Silurian

• Permian-Triassic

• Triassic-Jurassic

• Cretaceous-Tertiary

What is the primary cause of the Cretaceous-Tertiary extinction event?

• Ocean acidification

• Climate change

• Asteroid impacts

• Volcanic eruptions

Which period is known as the Age of Fish?

• Jurassic

• Devonian

• Carboniferous

• Triassic

What is the time frame of the Paleozoic era?

• 252 to 66 million years ago

• 4.6 billion to 541 million years ago

• 541 to 252 million years ago

• 66 million years ago to present