Eratosthenes - Measured the Earth

Question 1

What important post did Eratosthenes hold in Ptolemaic Egypt?

Accepted Answer

Chief Astronomer

Question 2

What was Eratosthenes&#x27; profession?

Accepted Answer

Librarian, Mathematician, Geographer, Astronomer

Question 3

How did he calculate "stades" (the length of a Greek stadium) between Alexandria and Syene?

Accepted Answer

he used bematists (Greek surveyors trained to measure distances in steps)

Question 4

What was Eratosthenes&#x27; position at the Library of Alexandria?

Accepted Answer

Chief Librarian

Question 5

What was Eratosthenes&#x27; nationality?

Accepted Answer

Greek

Question 6

What did Eratosthenes estimate with great accuracy?

Accepted Answer

The circumference of the Earth

Question 7

What was Eratosthenes known for?

Accepted Answer

Math and Geography

Question 8

The Sieve of Eratosthenes is an ancient algorithm for finding prime numbers

Accepted Answer

True

Question 9

What is the method Eratosthenes used to measure the Earth&#x27;s circumference?

Accepted Answer

He measured the angle of the sun's rays

Question 10

How did Eratosthenes calculate the tilt of the Earth&#x27;s axis?

Accepted Answer

He observed the positions of the stars

Question 11

Who was one of Eratosthenes&#x27; pupils?

Accepted Answer

Euclid

Questions 11