Warm up Put EON, PERIOD, AGE, EPOCH, ERA in order from largest to smallest

Geologic Time Scale Video https://www.youtube.com/watch?v=8qnnoePeHlk

Geological Time Scale

Precambrian Era Comprises about 88% of geologic time Longest part of Earth’s history, lasting from 4.0 billion to about 544 million years ago. Origin of Earth First one-celled organisms ( Bacteria) First multi-celled organisms

Paleozoic Era First fishes Trilobites dominant Cambrian Period (540 million years ago) """Age of Invertebrates""" First fishes Trilobites dominant First organisms with shells Ordovician Period (490 million years ago)

Paleozoic Era Silurian Period 443 million years ago """Age of Fishes""" First insect fossils Fishes dominant "First land plants” Devonian Period 417 million years ago

Paleozoic Era Carboniferous Period: Mississippian 354 million years ago """Age of Amphibians""" Extinction of trilobites and many other marine animals First reptiles "Large coal swamps” Large Amphibians abundant. Pennsylvanian 323 million years ago Permian Period million 290 years ago

Mesozoic Era Triassic Period 248 million years ago """Age of Reptiles""“ Jurassic Period 206 million years ago Cretaceous Period 144 million years ago Ended 65 million years ago Extinction of Dinosaurs and many other species

Mesozoic Era First flowering plants First birds Dinosaurs dominant.

Cenozoic Era Paleocene Period 65 million years ago Eocene Epoch 54.8 million years ago Oligocene Period 33.7 million years ago Tertiary Period Miocene Epoch 23.8 million years ago Age of Mammals Pliocene Epoch 5.3 million years ago

Cenozoic Era Quaternary Period Pleistocene Epoch 1.8 million years ago Humans Develop Holocene Epoch .01 million years ago

Geologic Time Scale Webquest Go To “Useful Links” on my webpage Click on Geologic Time Scale Webquest for links WRITING ANSWERS ON YOUR OWN PAPER!