Monday, 22 February 2016

Today in the classroom we have analyzed the sand we took from the beach of Poetto Cagliari's beach.

With the aid of a millimeter paper we were able of measuring the average diameter of each sand grain and we could observe them through an enlarger illuminated by the lamp of a smart phone.



Matteo observes the sand 



Francesco observes the sand


Then we added some drops of hydrochloric acid, the bubbles deriving from CO2 was clear, this meant that after the 2002 restoration of the beach, some chalky sand was added.



video





Finally we weighed the whole  sand and we measured the diameter of the resulting pyramid.

1 comment:

  1. Hello! I'm very impressed with your findings. So your beach has been nourished and you've discovered that they have not used exactly the same type of sand!!! CONGRATULATIONS!!!

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