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. 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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  2. 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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  3. 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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  4. 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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  5. Ecosystems

    Earthworms: Can these gardeners’ friends actually become foes?

    Asian jumping worms can strip leaf litter from floor of U.S. forests, new data show. Many native plants need that leaf litter for their seeds to germinate.

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  6. Environment

    Fighting big farm pollution with a tiny plant

    Fertilizer runoff can fuel the growth of toxic algae nearby lakes. A teen decided to harness a tiny plant to sop up that fertilizer.

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  7. Microbes

    Microbes mine treasure from waste

    Like miniature factories, bioreactors house microbes recruited to chew through wastes to clean dirty water, make chemicals or generate electricity.

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