PS2.B: Types of Interactions

Paul Andersen explains how objects interact when touching and at a distance.  Electromagnetic forces are very important when objects are touching and fields explain both electromagnetic and gravitational forces.  The strong and weak nuclear forces can result in radioactive decay.  A brief description of Newton's Law of Universal Gravitation and Coulomb's Law are includes.  A teaching progression from grades K-12 is also included.

CCC4: Systems and System Models

In this video Paul Andersen explains how systems can be used to understand phenomenon in science and create better designs in engineering.  He starts by defining the characteristics of a system and describes how system models can be used to better understand the world.  For example a system model of the water cycle can show the cycling of matter on the surface of the Earth.  He ends with a progression of instruction for a K-12 science classroom.

SEP7: Engaging in Argument from Evidence

Paul Andersen explains the importance of argumentation in improving both understanding and design.  This video begins with a discussion of the heliocentric and geocentric model of the Universe that eventually lead to the Copernican Revolution.  It highlights the importance of both informal and formal arguments.  It finishes with a discussion of the educational progression including a great question.