Measurement of the radius of the Earth
Level: 3º ESO
Group: 3º Bilingual
Work Group: ______________________________________________
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1. Eratosthenes’s experiment

2. Experiment at I.E.S. Llanes (26th March 2009).
3. Making a gnomon.
What it is and what it is for:

Drawing to explain how we used it:
Report: How we made the gnomon

4. Writing down data at the School playground.
MEASURMENT SHADOW LENGTH TIME
5. Calculation of the distance to Parallel 40°
a) With an Atlas :
b) Taking into account the Meridian
c) Taking into account the Parallel
6. Calculation of the angle of sun rays
a) Measuring the Tangent
b) Measuring on the place with a protractor
7. Photo gallery