Petri Dish Lab

In this lab experiment, we compared the amount of germinated Raphanus sativus’ in normal and frigid temperatures. My group and I predicted that more seeds in the normal temperature atmosphere would germinate, rather than the seeds in the frigid condition. The experiment starts with two petri dishes, and we filled each dish with fifty radish seeds. We made our first observations about the seeds that we see. We labeled one petri dish “Control,” and the other was labeled “Experimental.” The experimental petri dish was put in the freezer for seven days, and the control petri dish was set on the counter in the normal-temp classroom for seven days as well. After those seven days, the experimental dish was removed from the freezer, and we used a graduated
cylinder to pour 20ml of distilled water into both petri dishes. Then we covered the petri dishes with the lid, and set them both onto the same counter that the control petri dish was originally set on for the first seven days, for 48 hours. That is including the experimental petri dish. During that time period, we made a table discussing our initial observations about the experimental and control seeds. When those 48 hours passed, we poured the water out of each petri dish into a sink, and counted the amount of seeds germinated from the experimental and control group. We filled out the rest of the table we made on google docs with our final observations and the percentage of seeds that germinated. To find the average radical, we took the three radish seeds with the longest radical, and calculated the average of that using google sheets. We used google sheets to calculate the standard deviation and mean of our own personal results, and the class results. (2)