[Note: this assessment is available for download as a pdf and doc file:

Measuring the Earth Assessment (pdf)

Measuring the Earth Assessment (doc) ]

Name: _____________________________________
Due Date: _________________

Astronomy Assessment
Lesson: Measuring Earth

(1) Given that Eratosthenes calculated that the distance from Alexandria to Syene was th the circumference of Earth and that the distance from Alexandria to Syene was 500 stadia, what is the circumference of Earth in stadia? In miles?
Show work here:









Circumference in stadia: ______________________________
Circumference in miles: _______________________________

(2) How far off was Eratosthenes’ calculation in percent? (Please show your work)




(3) What are possible sources of error in his calculations? In other words, what factors contributed to Eratosthenes’ inaccuracy?
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________
______________________________________________________________________________________________________

Do NOT follow this link or you will be banned from the site!

Non-profit Tax ID # 203478467