3-LS3-1

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.

CCC1: Patterns

 

Paul Andersen explains patterns and describes why pattern recognition is an important skill in science and engineering.  He begins by discussing patterns in nature, including snowflakes, flower petals, seasons and nucleotides in DNA.  He then illustrates the importance of classification in describing and eventually understanding patterns.  He gives a progression instruction in the science classroom from grade K to 12.  A secret pattern is hidden within the video.

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.