Welcome To Class www.kendricknovak.wikispaces.com.

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Presentation transcript:

Welcome To Class www.kendricknovak.wikispaces.com

Agenda Turn in homework Geologic time scale Fossil Reading 2 Notes Fossil Reading 2 Review for test

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

Fossil Reading Due today

Review Worksheet due on test day Create a Note card (tomorrow)

Which are the oldest? Remember the laws/principles/unconformities Law of Superposition Principle of Original Horizontality 3 Unconformities Law of Cross Cutting Relationships

Absolute Age Radiometric/carbon dating Half life

Interpret a half life graph 5.8 days

.25 half lives

28 years

Review Work on the worksheet Due on the TEST!! Create a note card www.kendricknovak.wikispaces.com

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