WATER POLLUTION

Last day we study the germination of seeds in polluting agents.
Water pollution means one or more substances have built up in water
to such an extent that they cause problems for animals or people.
To investigate that we make an expirience. To do it we took three substsnces : Na OH,NH3 and Na Cl , we took four erlenmeyers and :
IN THE FIRST: we put 100ml of Na cl
IN THE SECOND: we put 0.01 of Na cl and mixt this with ditilled water
IN THE THIRD: we put 0.001 of Na cl and mixt this with ditilled water
IN THE FOURTH: we put only ditilled water
And when we have the dissolutions we put it in one petri sheet for each dissolution. In every petri sheet we put 10 seeds. When we finish this we waited for the results.