Geologic Time Scale

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What is the Geologic Time Scale?

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A system of chronological dating that relates geological strata to time, used to describe the timing and relationships of events in Earth's history.

Tags

NGSS.MS-ESS1-4

Front

During which era did dinosaurs live?

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Mesozoic Era.

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NGSS.MS-ESS1-4

NGSS.MS-LS4-1

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What was Pangaea?

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A giant landmass that existed when all continents were joined together.

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NGSS.MS-ESS2-2

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When did fish first appear on Earth?

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During the Paleozoic Era.

Tags

NGSS.MS-LS4-1

Front

What does the Cambrian Explosion refer to?

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The sudden appearance of many different types of lifeforms in the fossil record.

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NGSS.MS-LS4-1

Front

Approximately how long ago did water first appear on Earth?

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About 3.8 billion years ago.

Tags

NGSS.MS-ESS2-4

Front

What are the three main eras of the Geologic Time Scale?

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Paleozoic, Mesozoic, and Cenozoic.

Tags

NGSS.MS-ESS1-4

Front

What significant event marks the beginning of the Paleozoic Era?

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The Cambrian Explosion.

Tags

NGSS.MS-ESS1-4

Front

What is the significance of the Cenozoic Era?

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It is known as the 'Age of Mammals' and is when mammals and birds became the dominant land animals.

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What major geological event occurred during the Mesozoic Era?

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The breakup of Pangaea.

Tags

NGSS.MS-ESS2-3