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Online Lessons for Teachers: Learning Evolution

LESSON 3: 

What Is the Evidence for Evolution?

Back to LESSON 3

Activity 1: Evolution and Time

Activity 1: Teacher Notes

Activity 2: Evidence for Evolution WebQuest

Activity 2: Teacher Notes

Additional Activities

All in the Family
This activity asks you to assume the role of an evolutionary biologist to determine the phylogenetic tree for several sets of four organisms. It illustrates how outward appearances alone can be deceiving. You have access to a variety of scientific "tools," including images of internal structures, molecular analysis, and embryonic development. The activity shows that homologous structures indicate descent from a common ancestor.

 Screen grab from the All in the Family Web activity.

All In the Family
(Flash)

Varves: Dating Sedimentary Strata
By counting the number of varves (annual layers of sediment) in a piece of shale and extending that number to reflect the entire 260 meters of sediments, students have tangible evidence of the vastness of geologic time. (This activity requires the purchase of shale.)

 
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