Thursday, December 1st, 2011Bell Ringer:Pull out your Geologic Time Scale and Football Field. Then, sit back, and prepare for a full 25 minutes of Earth’s History!

Today’s Learning Goal:• The story of earth’s history• Review Geologic Time

Today’s Agenda:• Earth’s History• Review for Exam

4.6 Billion Years Ago

4.51 Billion Years Ago

About 4.0 Billion Years Ago

3.8 Billion Years Ago

When: Cambrian Period: 542 MYA

What: A sudden diversification and rapid evolution of life.

Why is it important: A major point in history that has implications for the evolution of life.

Permian Extinction

First Reptile

First Land Animal

First Land Plant

Permian Extinction: “The Great Dying”

When: At the end of the Permian Period – 250 Million Years Ago

Why: The largest mass extinction in Earth’s History! Over 95% of all species extinct, especially in marine environments.

What caused it: The cause is still unknown. Major volcanic eruptions worldwide, contaminating oceans with toxic chemicals

K-T Extinction (aka, extinction of the

Dinos)

First Flowering Plants

First Bird

Early Dinosaurs & Small Mammals

K-T Extinction: “Extinction of the Dinosaurs”

When: At the end of the Cretaceous Period – 65 Million Years Ago

Why: Most famous mass extinction: extinction of the dinosaurs.

What caused it: Giant Meteor:

Yucatan Peninsula CraterShocked QuartzK-T Clay layer.

Modern Humans… You!

First Hominids

First Grass!!!! ****

How about the Willamette Valley?!

http://www.youtube.com/watch?v=jg1Qo7N2m-k

Question for thought:

Will this story of the history of the earth stay this way?

Tomorrow:•Geologic Time Exam! (30 points) • Pre-Assessment KWL (3 points)• 10 Multiple Choice (10 points)• 3 Performance Questions (12 points)• 2 Short Answer Questions (5 points)