LS2+(5-6)+-+6


 * Students demonstrate an understanding of energy flow in an ecosystem by …**

6a identifying the sun as the major source of energy for life on earth and __sequencing the energy flow in an ecosystem__.

6b. __describing the basic processes and recognizing the substances involved in photosynthesis and respiration.__

What phenomena and representations help students understand these topics?
Richard Feynman describes how trees burn.

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