Geologic Time

The cartoon below is a humorous look at geologic history.  If Early Pleistocene mermaids had existed, their fossil remains would be the same age as fossils of...

• armored fish
• trilobites
• mastodonts
• dinosaurs

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Which geologic event occurred most recently?

• initial opening of the Atlantic Ocean
• formation of the Hudson Highlands
• formation of the Catskill delta
• collision of North America and Africa

The index fossil shown below are the remains of organisms that lived during which geologic era?

• Precambrian

• Cenozoic

• Paleozoic

• Mesozoic

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Which two forms of life existed together on the Earth during the same time period?

• dinosaurs and mastodons

• trilobites and birds

• flowering plants and trilobites

• mastodonts and flowering plants

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According to the Earth Science Reference Tables, when did the Jurassic Period end?

• 66 million years ago
• 163 million years ago
• 144 million years ago
• 190 million years ago

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Geologic history is divided into eras, periods, and epochs based on the

• type of rock deposited at different times throughout history

• half-life of radioactive isotopes found in rocks

• fossil evidence found in bedrock

• inferred movements of Earth's landmasses

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Trilobite fossils were recently discovered in Himalayan Mountain bedrock. During which geologic period could these organisms have lived?

• Tertiary
• Triassic
• Cretaceous
• Cambrian

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According to the Earth Science Reference Tables, studies of the rock record suggest that...

• the period during which humans have existed is very brief compared to geologic time
• evidence of the existence of humans is present over much of the geologic past
• humans first appeared at the time of the intrusion of the Palisades sill
• the earliest humans lived at the same time as the dinosaurs

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According to the Earth Science Reference Tables, near the end of which era did the dinosaurs become extinct?

• Precambrian
• Mesozoic
• Paleozoic
• Cenozoic

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NGSS.MS-LS4-1

Which life-form existed on Earth for the shortest period of time?

• Dinosaurs

• Ammonoids

• Trilobites

• Placoderm Fish

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