Lesson Snapshot

1. Engage: Students will be given a scenario in which they will have to make inferences from the evidence at hand and propose plausible theories using the Claims, Evidence, Reasoning (CER) model to explain what occurred.

2. Explore: Students will participate in a simulation showing glacial movement and its results. Students will view a real glacier flow time-lapse video over a 5-year period.

3. Explain: Students will create a t-chart explaining the similarities and the differences in their glacier model and real glacier movements. Students will examine the evidence for modern day Glacial Theory.       

4. Extend/Expand: Students will investigate original glacial evidence from the 1830’s. Students will “travel” along with Louis Agassiz on one of his field expeditions into the Alps. Students will play the role of William Buckland, a Geologist in the early 1800’s, who was unsure about glacial theory. Students will analyze the competing theories (glacial theory, diluvial theory, and drift theory) and test them against the  available evidence at hand.           

5. Evaluate: Students will write a speech to the British Association for the Advancement of Science to explain why they either support or reject Glacial Theory and cite the evidence for or against the theory.