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Bozeman Science
Thinking in Matter & Energy - Level 5 - Cycles and Flows
In this video Paul Andersen shows conceptual thinking in a mini-lesson on cycles and flows in matter and energy. Two examples are included in the video and two additional examples are included in the linked thinking slides. ...
Khan Academy
Khan Academy: Ecology: Biogeochemical Cycles Overview
Introduction to how water, carbon, nitrogen, and phosphorus are cycled through ecosystems. [7:54]