dijous, 29 de maig del 2008

WATER POLLUTION




Last day we went to the quimic laboratory and do an experiment. We ovservated the growth of the seeds. We used the next sustances:
NH3, destilated wather, HCL and NAOH but we too use material and is the next: petri's capsull, camera , ruller, cellulose.
We prepared three solutions (concentration 1 M, 0'1 M and 0'01 M) with this three pollutans , we soak the cellulose paper, we put this paper into a petri's capsulle and we put the 10 seeds of soya in it. After that we observed the growth. The last pass is taked some photos about the germinated seeds. The results are:






And the conclutions are:

In distilled water the growth is the best for the seeds but in the other pollwe can see that the seeds don't grow, because they have more polluting than the control. When we have 1M and 0'1M, the seeds don't grown.

And the conclution is that the polluting water doesn't let grow the seeds, and then there is no vegetables for us and for the hervivorous animarls.