In this unit, students will study the evolution of whales from four-limbed, land dwelling, mammalian ancestors to modern, two-finned, aquatic mammals through a virtual or in-class simulation lab. This activity will teach them more about how fossils, homologous structures, and DNA analysis provide evidence for macroevolution, evolutionary theory, and modern classification. This module was developed by Liz Ashby as part of a Virginia Commonwealth University STEM initiative sponsored by the Virginia Department of Education.

In the engage section of the 5Elesson, students are introduced to the role of fossils as evidence of evolution and evolutionary relationships by watching a videos about the discovery of Lucy and Ardi and consider what type of information that they can gain from skull fossils. Students will then explore features of skulls from human ancestors and the modern day Homo sapien. After measuring skull to cheekbone ratios, students will create a graph to compare various species. Several interactives are provided to explain fossils, skeletal evidence for human evolution, and phylogenetic trees. Then, students will apply their skills of analyzing data about anatomical similarities and genetic information to depict evolutionary relationships between organisms using cladograms. To evaluate student understanding, students will complete an evolutionary relationships CER.

Paul Andersen (of BozemanScience.com) explains how natural selection is a major mechanism in evolution. Also included in this resource are links to worksheets and a full transcript of the video.

Transcript added from YouTube subtitles. You can use this to write your own worksheet or quiz.