HS-LS2-5: Cycling of Carbon in Ecosystems

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

Clarification Statement: Examples of models could include simulations and mathematical models.

Assessment Boundary: Assessment does not include the specific chemical steps of photosynthesis and respiration.


The following assessments were created by science teachers hoping to better understand the NGSS. In most cases teachers went from standard to assessment in around an hour.  These are drafts and should be used accordingly. Feel free to improve these assessments or contribute to the collection. Learn more about assessment design here.




Cellular respiration
Carbon cycle
Earth’s systems
 - Biosphere
 - Atmosphere
 - Hydrosphere
 - Geosphere
Carbon-contain compounds (e.g. CO2, DIC, limestone, sugar)


Learning Plans


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