Montessori Geological Time Scale Work Part 1 - Precambrian-Hadean, Archean and Proterozoic Eons-Geological features, climate and life forms-Montessori 3 Part CardsLearn about the fascinating history of the very young Earth with this unit!The following materials are included:- 3 Eon Cards: Hadean, Archean and Proterozoic Eons (vocabulary cards and picture only cards with separate labels)- 3 Eon Info Cards (presenting specific information about each Eon)- 7 geological features, climate and life fo