1. MEASURING HISTORY Content Standards I understand the chronological order of history prehistory to modern day Essential Question: What are the key components of civilization?

2. THE STORY  The world is roughly 4.5 to 6 billion years old –we’re are going to round that to 5,280,000,000  Scientists believe the earliest humans branched off from chimpanzees around 5 to 7 million years ago  Hominids “Lucy” 2.3 to 2.4 millions years ago  First Homo Sapiens 400,000 to 500,000 years ago

3. THE MATH FOR MEASURING HISTORY  Let’s assume that the world is 5.280 billion years old. (5,280,000,000)  1 foot =1 million years (1,000,000)  To make the math easier, drop the zeros o 5,280,000,000 o 1,000,000  5,280 ft  5280 ft = 1 mile

4. LETS GET STARTED  The first simple cell organisms developed around 3.8 billion years ago. Dinosaurs developed around 230 million years ago. How many feet are there between the time of the first simple organisms and the dinosaurs?  3,800,000,000 230,000,000  3,570 feet

5. THE DINOSAURS  Dinosaurs roomed around from about 230 million years ago until about 65 million years ago. How many feet would Dinosaurs represent in the planets history?  230,000,000 65,000,000  165 feet

6. “LUCY” HOMINIDS  "Lucy" is estimated to be around 3.2 million years old, so lets assume that is roughly around the time the first humanish creatures developed. How many feet has it been since Lucy's time?  3,200,000  3.2 feet

7. FIRST MODERN HUMANS  The first Homo Sapiens developed in Africa around 200,000 years ago. How many feet do modern humans represent in the timeline of the planet?  200,000/1,000,000=.2 .02 inches

8. THE MODERN ERA  The Renaissance, which began around 1350, is often considered the beginning of the "modern era". How many feet of Earth's history belong to the modern era?  2011 1350  661years  661/1,000,000=0.0007 feet .0007/12=0.0001

9. WRAPPING IT ALL UP  To wrap this all up, the history that matters most to most of you is measured in a.00006 inches.