Exploring Geologic Time Scales

What is the largest division of geologic time?

• Epoch

• Era

• Period

• Eon

Tags

NGSS.MS-ESS1-4

Which era is known as the "Age of Reptiles"?

• Cenozoic

• Mesozoic

• Paleozoic

• Precambrian

During which period did the dinosaurs become extinct?

• Jurassic

• Triassic

• Cretaceous

• Permian

Tags

NGSS.MS-LS4-1

Which eon is known for the formation of the Earth?

• Phanerozoic

• Proterozoic

• Archean

• Hadean

Tags

NGSS.HS-ESS1-6

What is the current era we live in?

• Mesozoic

• Paleozoic

• Cenozoic

• Precambrian

Which period is known for the first appearance of mammals?

• Triassic

• Jurassic

• Cretaceous

• Devonian

What is the primary method used to determine the age of rocks?

• Fossil analysis

• Radiometric dating

• Stratigraphy

• Paleomagnetism

Which period is known as the "Age of Fish"?

• Cambrian

• Ordovician

• Silurian

• Devonian

Which era is known for the development of complex life forms?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What marks the boundary between the Paleozoic and Mesozoic eras?

• The Permian-Triassic extinction event

• The Cretaceous-Paleogene extinction event

• The Cambrian explosion

• The formation of Pangaea

Tags

NGSS.MS-ESS1-4