Today’s Agenda… Bellringer: Record your answers to the multiple choice packet on your own sheet of paper. Use capital letters! Review Fossils and Extinction Packet BrainPop Videos on Fossils and Extinction Notes on Geologic Time Scale Study Guide

Geologic Time Scale Using absolute dating scientists have calculated the ages of many different fossils and rocks From this information scientists have created a “calendar” of Earth’s history that spans more than 4.6 billion years

Geologic Time Scale Scientists divide Earth’s history into smaller units called eras Eras are divided into units called periods Each era and period contains certain events and the presence of certain prehistoric creatures For example: Dinosaurs in the Mesozoic Era

Which time period? Name the time period in which the following events occurred! 

Which time period? Do we currently live? Quaternary Period

Which time period? Did amphibians evolve? Devonian Period

Which time period? Did the first dinosaurs evolve? Triassic Period

Which time period? Did humans evolve? Quaternary Period

Which time period? Did the earliest fishes evolve? Ordovician Period

Which time period? Consists of the beginning of Earth’s history? Precambrian

Which time period? Did the earliest reptiles appear? Carboniferous Period

Which time period? Did land plants and animals evolve? Silurian Period

Which time period? Did plants that reproduce with seeds appear? Permian Period

Which time period? Did the first birds appear? Jurassic Period

Which time period? Did sponges, clams, snails, and worms evolve? Cambrian Period

Which time period? Did flowering plants become the most common type of plant? Tertiary Period

Which time period? Dinosaurs become extinct? Cretaceous Period

Which time period? Did insects and spiders resembling those of today appear? Silurian period

Which time period? Did the shark appear? Devonian period

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