HS-LS3-2

LS3.B: Variation of Traits

 
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In this video Paul Andersen explains how variation is created in a population over time.  Variation in offspring is caused by genetic recombination, mutations and environmental effects.  Parental DNA is recombined using the process of meiosis.  Mutations can add novel genes to a population and the environment can shape the expression of genes.  A K-12 teaching progression is also included.

CCC2: Cause and Effect

 

In this video Paul Andersen explains cause and effect its importance in science and engineering.  He starts by addressing the chain of interactions that must be present to show cause and effect.  He addresses the assumptions of universality and scale in determining cause and effect.  He finished the video with a progression of instruction from K-12.
 

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.