My students have just started an Earth Science unit, looking at the questions: What factors shaped our land? and How has Earth changed over time?
I got lucky that as I was planning this unit, I received the NSTA’s Science Scope December issue, which had a great article about using Oreo cookies to teach plate tectonics. I have attached the three day lesson I created that centers around that activity. In addition to the actual Oreos, I also utilized the Sciencesaurus book (green version) and another text, Science Explorer: Inside Earth.