HS-LS2-3

Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.

More Stories in HS-LS2-3

  1. Oceans

    Small swimmers may play huge role in churning the seas

    Hoards of migrating shrimp and krill can cause large-scale water movements in the ocean, a new study suggests.

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  2. Environment

    Trees can make summer ozone levels much worse

    The greenery can release chemicals into the air that react with combustion pollutants to make ozone. And trees release more of those chemicals where it gets really hot, a new study finds.

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  3. Microbes

    World’s deepest zoo harbors clues to extraterrestrial life

    Scientists have found a wide range of life deep below Earth’s surface. The discoveries could help inform our search for life on other planets.

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  4. Science & Society

    Cool Jobs: New tools to solve crimes

    Future investigators may identify criminals by the microbes they leave behind or by using DNA-like evidence from strands of their hair.

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  5. Ecosystems

    America’s duck lands: These ‘potholes’ are under threat

    North America’s prairies are in trouble. Scientists race against the clock for clues about how to save the plants — and animals — that call it home.

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  6. Environment

    Keeping space missions from infecting Earth and other worlds

    Scientists are always looking for ways to stop Earthly microbes from polluting other planets. The same goes for bringing bits of other planets back to Earth.

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  7. Science & Society

    Shrimp on treadmills? Some science only sounds silly

    Research that may seem silly, at first glance, often has a rewarding aim. Here are some examples.

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