After resetting the last Pea plant set I got 28/30 seeds that germinated but the reason why they didn't germinate was because one of them had mold on it and the other was just rotten. The picture to the left shows the the two different reasons. The bottom was the one with the mold and it looked really weird because of the fact that it was like spider webs with little tiny black spots on it. The optimal temperature for the pea plants to germinate in is between 20-25 degrees Celsius. Another factor that I tested out was if light had a difference in the germination rate of the plants, but I came to find that it doesn't have any kind of significant changes to the rate of germination.
About a Week has gone by since I put my fresh set of test tubes and as you can see there is some visible growth which is a good sign so far. Based on the tubes that have some growth in it are the ones that had Sodium Phosphate added to the tubes in addition to the normal solution. Next week I will be getting some samples from the test tubes to identify the different species of algae that are present in my set. While I look at the samples I will be setting the same experiment up so that I have more data to look at and compare it to the first.
Today I also helped josh with a small little task that involved the garden. I had to create a rectangle that is 33in x 36in out of PVC pipes so that one of the classes is able to plant seed in a grid system. I made one so far but now I must wait for more supplies to finish 2 more and glue all the pieces together.
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