Tigers Essay Research Paper Let There Be — страница 2

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radicle could be seen. Place red and green lamp around the trays making sure there is no overlap of light. Surround the area with cardboard. Water each individual container. Note: Take all measurements in Centimeters. Record all measurements in notebook. Describe the plants and how they are growing, e.g. withered, fallen down, weak, etc. Results My findings showed me that green light plants grow at a faster rate than red light plants do. This was confirmed by the provided graphs on the preceding pages. The statistical tests of the significance of the difference between two groups or the t-test is also shown in the preceding pages. I started recording data after leafs had shown. On first day of recording data, the green light plants seemed very alive With tiny leafs at the upper

part of plant, the red light plants seemed withered and not much growth observed. The second day, one could determine that the green light was better for the plants. The green light plants were very elongated with tiny leafs and some had fallen over. The red light plants were showing minimal growth but were strong and did not fall over. The last day the green light plants were all over the tray container. They were all like vines with little or no leafs. The red leafs were all standing upright and showed some growth, they had more branches on top and less on bottom. There were inter-nodel difference recorded where the red light plants were 5 cm apart from node to node and the green light inter-nodel differences of 6-8 cm apart. These values were all on average. Discussion:

Interpretation of the given graphs clearly shows that the green light plants grew higher in length compared to the red light plants. Interpretation of the t-test shows that there was a significant amount of difference in my groups. The t-test supports my results. The red and green light plants both grew more vertically than horizontally because they lacked the required light to grow leafs and branch more horizontally. This points out that plants do not use only one type of light for energy. An interesting observation that was noted was that the green light plants were all fallen over but the red light plants were standing upright. This leads us to speculate that red light plants grow at a slower rate then green light plants but red light plants are more stronger. The results

accepted the alternate hypothesis (Ha). Research on how light behaves and is absorbed provided some insight as to what is actually going on in this experiment. A substance absorbs a single type of light and reflects back the light not absorbed. For example, the green plants in this experiment can be described as being green in color, meaning that the plants are absorbing all the other colors of light on the visible spectrum and reflecting back green which is what your eyes see ( Gammon, 1999 ). This is related to my experiment because green plants need many different colors of light from visible spectrum, this experiment only subjected plants to green and red light resulting in more vertical growth due to the deficiency of required colors of light. Experimental error in this

experiment could have occurred due to ? undesired light ? coming in from uncovered portions of the experimental area. Error possibly occurred due to times data was recorded, three days spanned over two weeks including weekends so there was no daily recording of data, that is why there is good amount of increase on the last day. The time frame of this experiment was three days. An experiment done with a longer time frame could have shed better light on the subject. No pun intended. Gammon, Steven D. 1999 General Chemistry, Houghton Mifflin Co. Boston, MA Jude, Alex 1993-1999 Encarta 99, Microsoft Corp. , CD