Matching Pairs Geologic Time ScaleOnline version Direction: Match the divisions of geologic time scale on the left side with subdivisions it represents on the right side. Match also the subdivisions of period on the left side with the events on the right side. You have only 5 attempts to accomplish the activity, so be careful in answering. by Earth Science 1 Period 2 Silurian 3 Eon 4 Cambrian 5 MA 6 Epoch 7 Triassic 8 Devonian 9 Era 10 Quarternary first amphibians Pleistocene First fishes and chordates 4000 first mammals first vascular land plants Paleozoic Precambrian Evolution of Humans Jurassic