LS3.B: Variation of Traits


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.

CCC3: Scale, Proportion, and Quantity


In this video Paul Andersen explains the importance of scale in science and engineering.  The Universe varies in size along three scales: size, timespan, and energy.  Many phenomenon are too small and fast, or two large and slow to observe.  We use the tools of proportion and units of measure to comprehend different scales.  The video ends with a progression of instruction from K-12

SEP4: Analyzing and Interpreting Data

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Paul Andersen explains how scientists analyze and interpret data.  Data can be organized in a table and displayed using a graph.  Students should learn how to present and evaluate data.