This presentation is the beginning of my Evolution unit. I ususally spend a week or so discussing how current scientific knowledge leads us to this timeline. The presentation outlines when specific animal groups most likely developed. Frankly, in my classroom I would add many more pictures, but since I am worried about copyright infringements, I could only add a few and some custom pics and animation. It does not satisfy a specific
CA Science Standard, but it is a worthy primer for your evolution unit.
Created by Rob Whitbey.
Keywords: Earth, Timeline, Radiometric Dating, Early Life, Origins of Life, Evolution.