LS2.A: Interdependent Relationships in Ecosystems


In this video Paul Andersen explains the important relationships that exist in ecosystems.  He starts by delineating between organisms and their environment.  He explains how food webs can be used to show energy and matter flow in a community.  He describes the levels studied within ecology and explains how population interact at the level of a community.  He finishes be describing population growth and carrying capacity.

CCC6: Structure and Function


Paul Andersen explains how the structure of objects are related to their function and vice versa.  He begins with a quick quiz on bicycle construction and ends with a progression of teaching for students grades K-12.  He also explains how the scale of an object will determine the function studied.

SEP2: Developing and Using Models

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Paul Andersen explains the importance of modeling in science and engineering.  Models are used by scientists to explain phenomenon.  Unlike mental models, conceptual models can be shared by all scientists to improve our understanding of the Universe.  Engineers use models study systems and test designs.