01/04/2016
We can differentiate according to previous observations, regarding the column exposed to light we can see that water has lost turbidity, possesses a layer surface bacteria like the previous observation. Only black color apppears at the bottom of the column, the side of the column that does not receive light directly it is darker, i.e. that it possesses more iron sulfide. Shades of Orange appear on both sides of the spine, presenting more orange tones by the part who receives the light directly. The upper part of the column presents hints in greater numbers to the side of the column that does not receive direct sunlight. There are air bubbles throughout the column, especially in the intermediate zone. Compared with the dark column, we can see that there is not any change.
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