Between 1968 and 2002, the total number of peppered moths decreased by almost two thirds, although scientists do now know why. In the 10th video of the series, the instructor defines evolution as any changes to a gene pool. Scholars then explore the Hardy-Weinberg equilibrium and define natural selection as high fitness or low fitness. Finally, viewers see how good fitness can lead to adaptations and changes in the environment. 

Concepts

natural selection, evolution, genetic mutation, fitness, alleles, frequency

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Additional Tags

science

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Instructional Ideas

• Video best fits in the beginning of a unit on evolution as it defines evolution and its relationship to natural selection

Classroom Considerations

• Classroom should have a computer, access to the Internet, and a projection system
• Provides closed captioning for learners who struggle with hearing or with the English language
• Video assumes pupils understand mutations within DNA

Pros

• Includes a concept map, slideshow, and two review worksheets
• Provides a link to a related video on solving Hardy-Weinberg problems
• Utilizes high-quality diagrams and photographs

Cons

• None

Common Core

RST.9-10.1