Geologic History, Mass Extinctions, Fossils

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What is the Mesozoic era?

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The Mesozoic era is a major division of the geologic time scale, known as the age of reptiles, which lasted from about 252 to 66 million years ago.

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NGSS.MS-LS4-2

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What is a major cause of mass extinctions?

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Environmental change is a major cause of mass extinctions, affecting habitats and species survival.

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NGSS.HS-LS2-6

NGSS.HS-LS4-5

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Why can't we find the actual age of the Earth from its rocks?

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We cannot find the actual age of the Earth from its rocks because rocks are constantly being recycled, melted, and metamorphosed.

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NGSS.MS-ESS2-1

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What is the fossil record?

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The fossil record is the collection of all the fossils ever discovered on Earth, providing evidence of past life and evolution.

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NGSS.MS-LS4-1

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True or False: Extinctions always occur very slowly.

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False. Extinctions can occur rapidly due to sudden environmental changes.

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NGSS.MS-LS4-1

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What is the geological time scale?

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

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NGSS.MS-ESS1-4

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What are fossils?

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Fossils are the preserved remains or traces of ancient organisms, providing insight into past life forms and environments.

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

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What is carbonization in fossilization?

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Carbonization is a fossilization process where organic material is reduced to carbon, forming a thin film of carbon on the rock.

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NGSS.MS-LS4-1

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What is mineralization in fossilization?

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Mineralization is a process where minerals replace organic material in fossils, preserving the structure of the organism.

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NGSS.MS-LS4-1

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What is biological evolution?

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Biological evolution is the process through which species change over time through genetic variation and natural selection.

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4