Exploring Geologic History

What is the largest unit of geologic time?

• Era

• Period

• Epoch

• Eon

Tags

NGSS.MS-ESS1-4

Approximately what percentage of Earth's history does the Precambrian eon cover?

• 50%

• 75%

• 85%

• 95%

Tags

NGSS.MS-ESS1-4

Which of the following is NOT a reason why we know little about the Precambrian eon?

• Organisms were mostly soft-bodied and did not fossilize well

• It was a very short period of time

• Dramatic changes have altered the rock record

• Rocks from this time have been eroded and weathered

Which eon do we currently live in?

• Precambrian

• Phanerozoic

• Proterozoic

• Archean

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

• Paleozoic

• Proterozoic

• Mesozoic

• Cenozoic

Which period is known for the abundance of dinosaurs?

• Jurassic

• Devonian

• Ordovician

• Cambrian

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What is the term for the smallest unit of geologic time?

• Era

• Period

• Epoch

• Eon

Tags

NGSS.MS-ESS1-4

Which epoch is part of the Neogene period?

• Paleocene

• Eocene

• Miocene

• Holocene

What does an unconformity in the rock record indicate?

• A complete rock record

• A period of erosion or non-deposition

• A volcanic eruption

• A continuous sedimentary sequence

Tags

NGSS.MS-ESS1-4

Which period has a complete rock record in New York?

• Cambrian

• Triassic

• Paleogene

• Mississippian

Tags

NGSS.MS-ESS1-4