Personal Timeline Create a visual timeline of your

Personal Timeline Create a visual timeline of your life. • Include at least 5 major events that have happened in your life so far • Include at least 5 major events that you see happening in your future • Include pictures • Be sure you draw your timeline proportionately Due Friday 2/24/17

Geological Time Scale A Journey through the History of the Earth

Geologic Time • Eon – the largest division of geologic time, comprising of two or more eras • Era – large period of time described by the dominant life forms that were present at the time. • Periods – smaller blocks of time based on types of fossils found within each era

Eras of the Earth • Precambrian Eon – Hadean, Archaen and Proterozoic Era • Paleozoic Era – Cambrian, Ordocician, Silurian, Devonian, Carboniferous, Permian Periods • Mesozoic Era – Triassic, Jurassic, Cretaceous Periods • Cenozoic Era – Tertiary and Quanternary Periods

Eras of the Earth

Precambrian Eon • 4. 6 bya - 542 mya • Consists of 3 eras – Hadean: violent world (think Hades) – Archaean: cooler, ocean formed and land is forming, first prokaryotes (bacteria) 3 bya – Proterozoic: 2 super continents, atmosphere forming, first eukaryotes 2 bya, multicellular organisms start to form • Ended with global ice age

Paleozoic Era “ancient life” 542 mya to 251 mya Changing atmosphere Life becomes more complex and moves from the oceans to land • Giant volcanic eruptions ended the Era, almost 95% of life died • •

Mesozoic Era • “middle life” • 251 mya to 65 mya • Pangea formed and began to break up (plate tectonics) • Reptiles rule the earth… Dinosaurs! And land mammals • Climate is warm • Asteroid extinction

Cenozoic Era • • • “recent life” 65 mya to present Age of mammals Earth is beginning to look like it does today Modern Humans appeared 40, 000 years ago

Rock Cycle Evidence for the evolution of life on earth can be found in rocks and fossils.

Drawing Geologic Time Proportionally Precambrian Eon = ____ years Paleozoic Era = _____ years Mesozoic Era = _____ years Cenozoic Era = _____ years Total Age of Earth = ____ years

Earth Era – Mini Posters • Split your paper in 4 different parts • Title each section • What did each era look like? – What did life look like? • Foreshadow major extinction events