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How can fossils provide clues to the past?
Welcome To Class How can fossils provide clues to the past?
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Agenda Video Geologic time scale Brochure
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Video Fill out the worksheet
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Geologic Time If time was a 30 day month
Recorded human history would be .18 minutes or 10.8 seconds First Homo sapiens would be .013 days or minutes or seconds Cenozoic would be .42 days or 604 minutes Mesozoic would be 1.18 days or 1700 minutes Paleozoic would be days or 2808 minutes Precambrian would days or minutes
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In a day… Human history = 2.5 seconds Home sapiens = .6 minutes
Cenozoic = 20.2 minutes Mesozoic= 56.5 minutes Paleozoic= 93.6 minutes Precambrian= minutes
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Geologic Time Scale Geologic time scale – chart that divides Earth’s history into units of time Divisions based on geologic events and major changes in living things
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Geologic Time Scale Divided into eons, eras, and periods
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PRECAMBRIAN TIME Length– beginning of time (4.6 billion yrs) – 542 million years ago Makes up 88% of Earth’s history
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Precambrian Time Major Events Earth forms Rocks and minerals form
Stromatolites (algae) are most common fossils
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PALEOZOIC ERA
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Paleozoic Era Length – 542 – 251 million years ago Major Events
Supercontinent, Pangea, formed Shelled marine animals common Land Plants and animals appear Fish, amphibians, reptiles appear Permian mass extinction
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Paleozoic Broken Down Cambrian Ordovician Silurian Devonian
Carboniferous Mississippian Pennsylvanian Permian
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MESOZOIC ERA
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Mesozoic Era Length – 251-65 million years ago Major Events
Age of the Dinosaurs Major Events Pangea broke up Dinosaurs First Birds First flowers Dinosaur extinction
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Mesozoic Broken Down Periods in the Mesozoic Triassic Jurassic
Cretaceous
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CENOZOIC ERA
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Cenozoic Era Length – 65 million years ago-present Major Events
Age of mammals Major Events Mammals appear Continents in current places First humans
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Cenozoic Broken Down Tertiary Quaternary Paleocene Eocene Oligocene
Miocene Piliocene Quaternary Pleistocene Holocene
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Create a Travel Brochure
Pick 1 period or epoch Include information about the environmental conditions, animals, and plants Make it colorful and creative You want people to travel there Use Page
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