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Tennessee · Tennessee Science · Grade 7

7.LS2.1: Develop a model to depict the cycling of matter, including carbon and…

Develop a model to depict the cycling of matter, including carbon and oxygen, and the flow of energy among biotic and abiotic parts of an ecosystem.

The Tennessee Academic Standards for Science (2022) outcome 7.LS2.1 (Life Sciences) for Grade 7 says: “Develop a model to depict the cycling of matter, including carbon and oxygen, and the flow of energy among biotic and abiotic parts of an ecosystem.” This Fieldbook unit teaches it hands-on, with everyday materials and a printable teacher guide and student sheet for every lesson. Official wording: Tennessee Academic Standards for Science (2022).

How Plants Make Food: Photosynthesis and Respiration Grades 6–8

Where does a tree's mass come from, what happens to the sugar a plant makes, and how does the Sun's energy run a whole ecosystem? Three no-materials lessons with a 400-year-old willow experiment, printed atom cards and a carbon-atom role-play.

  • How does energy from the Sun move through a whole ecosystem? 50–60 min

    Every student becomes a carbon atom and travels between four stations, air, plants, animals and decomposers, drawing printed cards that say what happens next. The class tallies the journeys, then follows energy through a food chain, and explains why carbon goes round and round while energy passes through once.

Printable practice for 7.LS2.1

These pages practise a closely related idea; the match to 7.LS2.1 is partial.

Need just this outcome? Build a custom pack from these pages, with its answer key, in about a minute. Custom packs come with All-access and school licences.

Compared with NGSS: MS-LS2-3 (partial).

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