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Period: 276 BCE to 195 BCE
The life of Eratosthenes
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236 BCE
Eratosthenes the Librarian
Eratosthenes was appointed chief librarian at the age of 40 when the previous librarian of the Library of Alexandria died. -
194 BCE
Calculating the tilt of the Earth's axis
Eratosthenes accurately calculated the tilt of the Earth's axis using trigonometry and geometry. -
194 BCE
Map of the Known World
Eratosthenes made a map of the known world and made a system of longitude and latitude. -
194 BCE
The circumference of the Earth
Eratosthenes used the position of the sun as well as the distance from Alexandria to Syene to calculate the circumference of the Earth. Some believe that his calculations only had a 2% error. -
1 BCE
The Big Bang
This is when the universe first started. It wouldn't allow me to make it 14 billion years ago as the date, but that is when it first came into existence. -
1 CE
Birth of Jesus Christ
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476
Fall of the Roman Empire
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Period: 1300 to
The Renaissance
The period in time when men and women started challenging traditional beliefs and values. -
1492
Columbus finds the Americas.
This allowed for the great exchange of resources, animals, cattle and disease. -
Period: 1517 to
The Reformation
This reformation brought back the church to its biblical roots. This created the Catholics and Protestants. -
Period: to
The American Revolution
The war against Britain, which lead to the creation of The United States of America. -
Period: to
Dimitri Mendeleev
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Organic Chemistry
Mendeleev publishes his book, which gets him the Domidov Prize. -
Mendeleev becomes a professor at University of St. Petersburg
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Publishes The Principles of Chemistry
The first edition of the book, which gave people much insight on chemistry back then. -
The periodic table
Mendeleev creates the periodic table, furthering the organization of the elements. -
Period: to
Alfred Wegner
Alfred Wegner's Life -
Fired!
Mendeleev gets fired from his university for supporting student dissent. -
Mendeleev accepts position as director of the Bureau of Weights and Measures
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The Copley medal
Mendeleev gets awarded the Copley Medal from the Royal Society of England -
Hot Air Balloons And the Arctic
Wegener and his brother Kurt set the world record for longest time spent in the air with a hot air balloon. He later went on an expedition to track air circulation with the help of the balloons. -
Period: to
Harry Hammond Hess
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University
Alfred Wegener started teaching at the University of Marburg. -
The hinting evidence
Wegener noticed on a world map that the east coast of South America fits exactly with the west coast of Africa. This is his first notice of Pangea. -
The Thermodynamics of the Atmosphere
Wegener wrote his book with Vladmir Koppen, and it soon became popular. -
Alfred Wegner says the continents are in motion
Wegener produced evidence that the continents were in motion, but he couldn't prove what forces pushed them apart. This caused widespread scorn for Wegener. -
Period: to
World War 1
The first time a large war had occurred and multiple countries choose sides. -
New University
Wegener accepted a professorship of meteorology and geophysics at the University of Graz in Austria -
Period: to
The Great Depression
The worldwide economic depression that took place as a result of inflation. -
Period: to
The Cold War
A state of tension as the U.S. and the U.S.S.R kept getting involved in proxy wars over communism and nuclear bombs. -
History of Ocean Basins
Hess' new book talking about the ocean floors and how continental drift was true. He used sounding gear and saw the ocean floor was rugged and mismatched instead of smooth. -
I AM ALIVE!!!!
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Period: to
My life
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I move to America
This is when i flew from India to America -
I move from St. Louis to Seattle
This was my first move through America, and it changed everything. I went from slightly cold days and snow to freezing all-year round. -
I drove from Seattle to Phoenix
This was another large move, and also the final move for me during my childhood. -
Period: to
Living in an apartment
During this time period, we lived in a small apartment, where i met my some of my best friends. -
From 2012 to now, I've been living in a House
The move from the apartment to the house caused me to change schools, a big change because it was my first year of middle school -
After i left my middle school, I joined Mountain Ridge High School
This was a big change for me, because I decided my self to go somewhere else for high school instead of the charter school I was in before. -
Started playing Tennis
My move to MRHS was largely due to wanting to be more involved with sports. This is when I picked up tennis. Later on, tennis became a big part of my life. -
In the summer of 2017, I flew back to India to visit family
This visit made me a lot wiser, as I saw how much better it was to live in America, and how it would have been a lot tougher in India. It helped me realize that I needed to work hard and improve myself. -
I started taking Online Classes
In order to improve my grade and make sure that I made it to college, I decided to take online classes. -
The Origin of Continents and Oceans
Wegener found more evidence that the continents were all joined together in the past and used it to publish his book. However, scientists thought that he was incorrect.