Chapter 11 Geologic Time Geologic time measurements Eon

Chapter 11 Geologic Time

Geologic time measurements • Eon = billions of years • Era = millions of years • Period = tens of millions of years or hundred of millions of years

Major divisions in Geologic Time Scale • Abrupt changes in types of fossils within layers • Changes in fossil record are irregular • Climate change could cause mass extinction (e. g. meteorites & dinosaurs)

The Paleozoic Era • 542 mya – 251 mya • Time of dramatic geological, climatic and evolutionary change • Cambrian explosion: invertebrates, fish, arthropods, amphibians, reptiles

Today • Crazy Creature Project • Science Fair meetings – February 12 th Experimental Investigation Planning Sheet

Mesozoic and Cenozoic Era Announcements 1. Next class: Review and Quiz on Chapter 11 2. Reminder: Crazy creature project due Tuesday TODAY 1. On a scrap sheet of paper: Make a list of the key terms that you would use to research your crazy creatures project 2. Feedback: Nicole

Today Four sections: Geology of the Mesozoic Era (p. 379 -381), Mesozoic Life (p. 382 -383), Geology of the Cenozoic Era (p. 387 -389), Cenozoic Life (p. 390 -392) 1. Create a prezi presentation on your assigned section: http: //prezi. com/. Think about making your presentation interactive. 2. Check out the timeline: http: //science. nationalgeographic. com/science/prehistor ic-world/prehistoric-time-line/

Mesozoic and Cenozoic Era Today: 1. Feedback: Nicole 2. Be ready to present in 5 min 3. Guess what movie we are watching next week!

Today 1. Send your presentations to me. I will then share all presentations with the rest of the class. 2. Work time: - Study for Chapter 11 Quiz - Crazy creatures project