How can fossils provide clues to the past? Welcome To Class How can fossils provide clues to the past?

Agenda Video Geologic time scale Brochure

Video Fill out the worksheet

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 18.72 minutes or 1123.2 seconds Cenozoic would be .42 days or 604 minutes Mesozoic would be 1.18 days or 1700 minutes Paleozoic would be 1.95 days or 2808 minutes Precambrian would 26.4 days or 38106 minutes http://www.athro.com/geo/hgfr1.html

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= 1269.7 minutes

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

Geologic Time Scale Divided into eons, eras, and periods

PRECAMBRIAN TIME Length– beginning of time (4.6 billion yrs) – 542 million years ago Makes up 88% of Earth’s history

Precambrian Time Major Events Earth forms Rocks and minerals form Stromatolites (algae) are most common fossils

PALEOZOIC ERA

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

Paleozoic Broken Down Cambrian Ordovician Silurian Devonian Carboniferous Mississippian Pennsylvanian Permian

MESOZOIC ERA

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

Mesozoic Broken Down Periods in the Mesozoic Triassic Jurassic Cretaceous

CENOZOIC ERA

Cenozoic Era Length – 65 million years ago-present Major Events Age of mammals Major Events Mammals appear Continents in current places First humans

Cenozoic Broken Down Tertiary Quaternary Paleocene Eocene Oligocene Miocene Piliocene Quaternary Pleistocene Holocene

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 218-226