Students learn about how there is evidence that the asteroid that wiped out the dinosaurs was as powerful as 10 billion atomic bombs and caused sulfur to be released into the atmosphere creating a global cooling event through a C.E.R. (Claim Evidence Reasoning) graphic organizer. This is great for getting your students to explain phenomena in a meaningful way and it allows you as the instructor to adequately assess their understanding of concepts. The students figure out what the "Claim" is in t