ESS2.C: The Roles of Water in Earth’s Surface Processes

In this video Paul Andersen explains the vital role that water plays in the processes on the Earth's surface.  Water has several unique properties including high heat capacity, transparency, polarity and the ability to change the chemical behavior of the mantle.  The Earth is largely a water planet but most of the water is found in the oceans or locked in ice.  Water is a powerful erosive force on the planet.  A K-12 teaching progression is also included.
 

CCC5: Matter and Energy

In this video Paul Andersen explains how matter and energy flow and cycle through systems.  He starts by explaining how energy and matter input and output will always be conserved.  He addresses the many misconceptions surround energy and matter including the belief that food contains energy.  He explains how nuclear reactions conserve both batter and energy.  The video ends with a teaching progression for grades K-12.

SEP2: Developing and Using Models

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.