September 16, 2002
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Highlands Ranch High School - Mr. Sedivy
How Old Is the Universe?
About 15-billion years old - 15,000,000,000. (By the way, 99% of the matter in the universe is invisible, or dark matter, composed of some kind of material no one can yet detect.)
How Did the Universe Start? How Big Is It?
Milky Way Galaxy
Formation of the Earth
January 1 - Big Bang
May 1 - Milky Way Galaxy
September 14 - Formation of the Earth. (4.5 Billion Years Ago)
October 2 - Formation of Rocks
November 12 - Oldest Fossil
December 1 - First Significant Oxygen Appear
December 31, at 10:30 p.m. - First Humans (100,000 Years Ago)
How Do We Know About Prehistory?
Themes of the Course
What Every Civilization Needs To Survive
1. Dependence on natural resources - What things in nature are needed to survive?
2. Development of economic - Who leads?
3. Development of political systems - How are resources divided?
4. Development of religion - What is their spiritual life?
5. Types of social structure - What are the roles of young and old, men and women, races, etc.?
6. Role of technology - What did they make to better their lives? What was their knowledge?
7. Fall / Evolution of the civilization.
Origins of Man
1. Australopithecines (southern apes) - 4 to 5 million years ago
2. Australopithecus Afarensis - 3.5 to 2.5 million years ago. (Lucy) Average: 4 feet tall, 75 pounds. Big: 5 feet tall, 100 lbs.
3. Homo Habilis (handy man, tools) - 2.5 million years ago
4. Homo Erectus (upright man) - 1.6 million years to 300,000 years ago. (Tall and thin, about 6 feet tall.) Tall and thin was good because the body cools more easily and it is easier to run. Spread into Europe and Asia.
5. Homo Sapien (thinking man) - About 300,000 years ago. (first discovered in Germany)
6. Homo Sapien Sapien - About 100,000 years ago. Oldest found so far in Colorado, about 8,000 years old.
Reasons for Humans Success
Historical Periods of
| Mesopotamia & Phoenicians |
Cool Clicks & Related
Highlands Ranch High School 9375 South Cresthill Lane Highlands Ranch, Colorado 80126 303-471-7000
Mr. Sedivy's History Classes
| Colorado History | American Government | Advanced Placement Modern European History | Rise of Nation State England | World History |
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