Chemistry > Lab Report > Chemistry 151-51>Lab Report: Bean Sprout Experiment Example (All)

Chemistry 151-51>Lab Report: Bean Sprout Experiment Example

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Introduction The purpose of the Bean Sprout experiment was to examine how different variables can affect the germination rate of seeds. From previous studies, my group and I knew that various variables such as water, sunlight salinity, temperature, seed depth, humidity, viability of seed, space, dormant seed period, and the thickness of a seed coat would affect the germination rate of seeds. Out of those ten variables, three variables were used in the experiment. These variables were salinity, temperature, and sunlight. The hypothesis for the first variable was that increased amounts of salinity would decrease the germination rate of the bean sprout seed. For the second variable, the hypothesis was that higher temperatures would increase the germination rate of the seeds. Lastly, the hypothesis for the third variable was that increased amounts of sunlight would also increase the germination rate of seeds. Materials  10 5X8 bags  Ruler  Permanent Marker  100 Beans  Paper Towels  Tap Water  Salt Method To test whether increased amounts of salinity affect the germination of seeds, three different percentages of salt were added into three different bags of ten seeds. Ten seeds were placed horizontally on a paper towel and each of the three bags received the same amount of water. The percentages of salt that were added were 5%, 10%, and 15%. The independent variable in this experiment was salinity and the dependent variable was germination rate. The control for this experiment was an identical bag without any added salt. For the second test the variable temperature was analyzed to determine if increased amounts of temperature affected germination. Three bags with ten seeds were placed horizontally and received the same amount and were placed in three different locations. The locations were near a window sill, near an air vent, and lastly in the middle of a room. The independent variable in this experiment was the change in temperature and the dependent variable was the germination rate. The final variable that was tested was sunlight. Three bags that had 10 seeds in them each and received the same amount of water but were placed in different areas were analyzed. The three areas were outside, in a dark room, and in a room with an electric light. The This study source was downloaded by 100000822472680 from CourseHero.com on 04-07-2021 13:49:38 GMT -05:00

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