MS-ESS1-4

Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used to organize Earth's 4.6-billion-year-old history.

More Stories in MS-ESS1-4

  1. Space

    Dust-shrouded monster is a snapshot from the early universe

    Scientists have spotted a massive galaxy from the early universe shrouded in dust. It turned up in a small survey by the ALMA radio telescopes in Chile.

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  2. Planets

    How Earth got its moon

    How did our moon form? Scientists are still debating the answer. It may be the result of some one big impact with Earth — or perhaps many small ones.

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  3. Earth

    Is Zealandia a continent?

    Geologists are making the case for a new continent, that they would dub Zealandia. It can be found largely submerged beneath the southwestern Pacific Ocean.

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  4. Earth

    Oxygen-rich air emerged super early, new data show

    Scientists had thought animals were slow to emerge because they would have needed oxygen-rich air to breathe. A new study finds that plentiful oxygen may have developed early. So animals may have been late on the scene for another reason.

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  5. Earth

    Cool Jobs: Mapping the unknown

    Scientists find different ways of exploring places humans will never visit — and drawing maps to help us better understand such mysterious places.

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  6. Space

    Pollution may give ‘first’ stars a youthful look

    The oldest stars should be made of only light elements. But these suns may have sucked up heavier elements, giving them a more youthful appearance, a new study finds.

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  7. Planets

    Asteroids boiled young Earth’s oceans

    At least two asteroids hit Earth 3.3 billion years ago. This superheated the atmosphere, boiled the oceans and shaped how early life evolved.

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