Are we, as some scientists theorize, in the midst of the sixth mass extinction? Scholars explore speciation through adaptive radiation and extinction with a video that uses the three-spines stickleback in Alaska, and its current speciation due to poisoning of the lake as a model.

Concepts

speciation, extinction, adaptive radiation, mass extinction

Show More Show Less

Additional Tags

science

Show More Show Less

Instructional Ideas

• Have scholars research the five mass extinctions and present findings to the class

Classroom Considerations

• Video assumes learners know something about phylogenetic trees
• Video repeats some parts of #16 in this series (Speciation)
• Video 17 in a series of 18

Pros

• Video provides links to concept map, two review worksheets, and a slideshow that follows the video
• Uses high-quality photographs and videos to supplement the topics discussed

Cons

• None

Common Core

RST.11-12.2