Living on a Layer Cake: An Investigation of Local Geological History
Twelfth graders study the local geological history by examining various types of geological evidence. They build a multi-coloured plasticene model and drill with a straw to show the rock layering.
12th Science 3 Views 12 Downloads
Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon
During the Achaea Eon, Cyano bacteria start to produce and release oxygen into the atmosphere making the environment suitable for Eukaryotic life forms. Sal explains the timeline of these events as well as the consequences that occurred...
10 mins 10th - 12th Science