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We really enjoyed our talk on Skype this morning. Thank you for being our partner in Eratosthenes experiment !

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III F Scuola Belvedere - Napoli

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Experimenting is always fun, reflecting is necessary to continue our learning !
Let's answer all our questions together and decide what we can do next time to make the experiment even more successful.
Looking forward to our Skype discussion.
Zadar calling Napoli next week :-)

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Hi everyone, it's the time to some reflections:

The measure related to the Equator is better than the measure related to the other school

Why?

What do you think about?

In your opinion if we could relate our measure with a school more distant, will the error be larger or smaller?

Do you think is it possible repeat the experiment in other day? If you think so, WHEN?

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Eratosthenes experiment 3F (by Camilla I.)

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Eratosthenes experiment 3F (by Camilla I.)

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Yesterday was the spring equinox, the day when we have (about) 12 hours of daylight and 12 hours of night. Following the method used by the scientist Eratosthenes, we tried to calculate the circumference of the Earth. We needed: a one m long wooden stick, a tape measure, a piece of white chalk and a ruler.
At the moment of our local noon, a guy drew a sign on the ground using the chalk, to indicate the point where the stick's shadow ended; and then another guy measured the length of the shadow: about 82 cm.
At the end, the teacher Ricci calculated the circumference of Earth by using Eratosthenes' formula.

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Celebrating the results of our experiment

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Celebrating the results of our experiment

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Scuola Secondaria di I grado A. BELVEDERE

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Scuola Secondaria di I grado A. BELVEDERE

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Sunny skies and Eratosthenes experiment

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Deep concentration when calculating

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Calculating in the sun.

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Solar noon 12:06:07

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All of us together ! Zadar, Croatia and the students of Osnovna škola Petra Preradovića, class 7c.

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Solar noon in Zadar, in front of Saint Donat !

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We need a one meter long stick, a meter, a calculator but above all ..................we need the SUN!!!!!!

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First of all we have to determinate the solar noon, and we can do it with "stellarium"

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Eratosthenes knew that at the summer solstice the sun shone directly into a well at Syene at noon. At the same time, in Alexandria, Egypt, approximately 787 km due north of Syene (now Aswan), the angle of inclination of the sun's rays was about 7.2°. With these measurements he computed the diameter and circumference of the earth.

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Osnovna škola Petra Preradovića
Zadar, Croatia

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Scuola Secondaria di I grado "A. Belvedere"
Napoli, Italia

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Schools 2017