food chain / toad take energy / energy flow / food energy / acceptable food sources / food web / take energy / energy webs / cards picturing food web components / mere passive energy transfer / food using energy / passive energy transfer / food web relationships / energy transfer relationships / food sources / energy transfer / Food webs / energy links / high school food web / energy / in understanding passive energy transfer / /
Organization
Ecosystems Unit / MIT Media Lab / Harvard Graduate School of Education / Maynard Ecology Center / Classroom Studies Tina A. Grotzer Harvard Graduate School / National Association for Research / Edward C. Brooke Charter School in Boston / /
Person
Scott / Jody Clarke / Shari Metcalf / Leach / Tina A. Grotzer Harvard / Chris Dede / Domino / Work / /
Content knowledge about ecosystems and populations is an important strand of the life science content standards; and the processes underlying ecosystems exemplify sophisticated causal mechanisms (e