HS-LS2-5

Develop a model to illustrate the role of photosynthesis and cellular respiration in the cycling of carbon among the biosphere, atmosphere, hydrosphere, and geosphere.

  1. Microbes

    Recycling the dead

    When things die, nature breaks them down through a process we know as rot. Without it, none of us would be here. Now, scientists are trying to better understand it so that they can use rot — preserving its role in feeding all living things.

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  2. Environment

    Native ‘snot’

    The ‘rock snot’ choking rivers may be native algae. Experts blame its sudden and dramatic emergence on changes in Earth’s atmosphere, soils and climate.

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  3. Microbes

    Life in the bacterial underground

    Tiny life forms in rock may coax minerals to release hydrogen for food.

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