Tagged: Earth unit


Earth Science: Layers of the Earth Hands-On Activity

Last week, I mentioned that we learned a bit about the Solar System in general.  This week we’ve been looking more closely at Earth’s long history.  We’ve been going over the four major eons and looking more closely at what happened in each (Hadean Eon, Archean Eon, Proterozoic Eon, Phanerozoic Eon). At first 4.6-4 billion years ago, the Earth would have been molten. Then as the Earth cooled it went from liquid...