$5 Question #2!!!
O.K. Nobody say, "Christopher Columbus."
A long time ago a man proved that the Earth was round. It had already been speculated for some time that our planet was not flat, like a pancake, but rather that it was round like a baseball. This gentleman, however, decided to do one better than speculation. He actually used math to figure out the size and shape of the Earth. He was the first to do so.
For $5.00:
1. Who was he?
2. When did he live?
3. Where was he when he did it?
4. How did he do it?
5. How close was he to being right?
Answer all five questions for all $5.00 (there will be no partial prizes). Prize will go to the first SPA student to post the correct answer to this blog as a comment. Although your comments will be received, they will not appear on the blog until after school on Friday, March 10.
JJ
posted by The UROK Team: @ 4:39 PM
6 Comments:
Aristotle first theorized that the earth was round. Columbus died believing he proved Aristotle correct, but the real confirmation came in the expedition of Ferdinand Magellan, the captain of the first ship to sail completely around the world.
Magellan was a Portuguese sailor who explored Asia. While he was in Asia, Magellan picked up an Asian boy he called Enrique, who he brought back to Portugal. Magellan asked the King of Portugal to finance an expedition around the world. When the king rejected him, Magellan disowned his allegiance to Portugal and offered his services to Spain.
Magellan left Spain in 1519 with five ships. It took more than fourteen months to find the southern opening to the Pacific Ocean. He found it in the frigid, stormy waters now known as the Strait of Magellan. What Magellan did not count on was the immensity of the Pacific, a body of water larger than all of the land on earth. Magellan expected Asia to be a few hundred miles past beyond the coast of South America. Instead, the expedition traveled 12,600 miles before reaching land
1.Nicolaus Copernicus
2.lived from 1473 to 1543
3.Europe
4.influence of the Church and the notion that this math notation was a pagan idea, acceptance and use of this math notation switched gradually from Roman numerals to the Hindu-Arabic characters. Plus (+) and minus (–) signs were introduced, along with the first use of decimal notation. The extension of positional notation to fractions (3/4 = 0.75) occurred in the late Sixteenth Century
5.He was pretty close but his model only had 6 planets when Kelper's had 7.
out of all this research i would like you to know that all of the philosophers used some sort of math.
the man's name was Eratosthenes.
he lived between 276-195 B.C.E.
he was in egypt when he did this.
he measured the shadow and using the distance between two sticksfigured the earth's circumfrence to be 40,074 km.
he was 99 miles off.
his name is eratoshtenes. lived in 276 b.c. he lived in greece.Knowing also that the arc of an angle this size was 1/50 of a circle, and that the distance between Syene and Alexandria was 5000 stadia, he multiplied 5000 by 50 to find the earth's circumference. His result, 250,000 stadia (about 46,250 km) is quite close to modern measurements. [He later altered this figure to 252,000 stadia. ed.]. The formula Eratosthenes used is: D/d =A/a. Where d = distance between Syene and Alexandria, A = 360 degrees assumption of round earth, a = shadow angle of vertical stick, D = to be determined (circumferenceEratosthenes measured the tilt of the earth's axis with great accuracy, obtaining the value of 11/83 of 180, namely 23 51'15". This tilt of the earth gives us the seasons. he was susprisingly accuarate.
1. Eratosthenes
2. was born 276bc died 194bc
3. he did his calculations in Alexandria, although he was born in Cyrene, North Africa (now Shahhat, Libya)
4. he used shadow length from two diffrent locations and figured out the sun was in a diffrent location at the same time of day
5. estimated the circumference of the Earth to be 250,000 stadia.
because he used an old measurment there's an argument about how exactly how close he was. (he was really close in my opinion and to others)
1. Who was he?
2. When did he live?
3. Where was he when he did it?
4. How did he do it?
5. How close was he to being right?
1.Christopher Columbus wa born in Genoa, he was the son of a wool merchant and weaver.
2. he was born in 1451 and died in 1506 on may 20.
3.sailed west across the atlantic ocean in search of route to asia but got fame by landing in america instead.
4.While on a voyage for Spain in search of a direct sea route from Europe to Asia, Christopher Columbus unintentionally discovered America.
5. he was very close like right next to the continent, but he went west, instead of east and hit America which is before asia if your heading west from Europe!
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