ENGLISH LESSON:
In the English class we'll work Eratosthenes 's biography. The document is here.
Eratosthenes's biography
GEOGRAPHY CLASS:
We'll watch two videos which have been subtitled in English.
First Video: Carl sagan explains how Eratosthenes discovered that the Earth was not flat.
After this we can watch another video as a complement of Carl Sagan's explanation.
This power point presentation explains the importance of Alexandria in Eratosthenes's times and how some Greek phisolophers and mathematitians had proposed the idea of a spherical earth before him.
(Eratosthenes Earth Measure)
We'll Watch this animation on how the sun rays strike the Earth on different days and months of the year.
Finally and to remember what we have learnt we can Read how Eratosthenes calculated the circumference of the Earth in an interactive video.
MATHS CLASS
We'll need to learn and practise some trigonometry to be able to make the calculations.
PLANE TRIGONOMETRY
FINALLY on the 26th March, we'll try to measure the radius of the Earth. We'll go to the playground with our gnomos and we'll wait for the sun rays to cast a shadow every ten minutes. We'll measure the shadow length. We'll write the data, our calculations, comments and results in this working sheet.
Hojadedatos.RADIODELATIERRA escanear0007
TECHNOLOGY CLASS
We'll follow the instructions to make a proper base for a stick (our gnomon) step by step:
GNOMON1 MATHS CLASS
We'll need to learn and practise some trigonometry to be able to make the calculations.
FINALLY on the 26th March, we'll try to measure the radius of the Earth. We'll go to the playground with our gnomos and we'll wait for the sun rays to cast a shadow every ten minutes. We'll measure the shadow length. We'll write the data, our calculations, comments and results in this working sheet.
