Geologic History of Earth STEMscopes

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What is the Geologic History of Earth?

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The Geologic History of Earth refers to the timeline of events and processes that have shaped the Earth, including the formation of rocks, the evolution of life, and major geological events like earthquakes and volcanic eruptions.

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NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

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What is a fossil?

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A fossil is the preserved remains or trace of an organism that was once living, often found in sedimentary rock.

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What does the term 'rock strata' refer to?

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Rock strata are layers of sedimentary rock that have formed over time, each layer representing a specific period in Earth's history.

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NGSS.MS-ESS1-4

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What is stratigraphy?

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Stratigraphy is the study of rock layers (strata) and layering, used to understand the chronological sequence of geological events.

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NGSS.MS-ESS1-4

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What can fossils tell us about the past?

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Fossils provide evidence of past life forms, their environments, and how they evolved over time.

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NGSS.MS-LS4-1

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What is the significance of the fossil record?

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The fossil record is a historical archive of life on Earth, showing the progression of species and their extinction over geological time.

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NGSS.MS-LS4-1

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What does it mean if a species is said to be extinct?

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A species is considered extinct when there are no remaining individuals alive anywhere on Earth.

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NGSS.MS-LS4-1

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How do scientists determine the age of rock layers?

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Scientists use methods like radiometric dating and relative dating to determine the age of rock layers.

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NGSS.MS-ESS1-4

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What is the principle of superposition?

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The principle of superposition states that in undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.

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NGSS.MS-ESS1-4

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What is an earthquake?

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An earthquake is the shaking of the Earth's surface caused by the sudden release of energy in the Earth's lithosphere.

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NGSS.MS-ESS3-2