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 Era 2 Epoch 3 Quarternary 4 Eon 5 Period 6 Devonian 7 MA 8 Triassic 9 Cambrian 10 Silurian Precambrian Pleistocene Paleozoic First fishes and chordates first vascular land plants 4000 Jurassic first mammals Evolution of Humans first amphibians