Lina Pan
Writing a Conclusion: Penny Lab
Using the template below, you are to complete the following questions in your conclusion.
1. What did you investigate (purpose)?
2. Summarize the experiment in a few sentences.
3. Was your hypothesis supported (correct) or negated (incorrect)?
4. Cohesion and surface tension information & comparison of results of the other groups
5. What could you do to extend this experiment?
6. Questions you still have (optional for this lab)
7. What would you would do differently next time.
Conclusion:
This experiment investigated Whether the different liquid will affect the amount of penny drip.
In order to study the problem that the same penny, the amount of drip directly with a plastic pipette, and a penny soaked in soap with a plastic pipe drip quantity is different? Why did this happen?
Results showed Penny drip soaked in soapy liquid No ordinary penny drip more. Penny cohesion of the soapy liquid did not touch more
This proved that the hypothesis that if the liquid placed on the penny decreases the surface cohesion then the penny will hold less drops of water was supported because different liquids have different density, cohesion is also different. This experiment works on cohesion and surface tension. Because under the same conditions, the density and the condensing force are changed by the soapy solution, and the comparison is made. In addition, each experiment was carried out four times, and the accuracy was more secure.
To extend this experiment Under the action of surface tension, the droplet always tries to keep the sphere. So we don't use paint, we don't use brushes, we use liquid specific surface tension, water to draw, although it's a little bit easier but it's also very interesting.
Questions about the experiment include that We experimented indoors. If the temperature changes, the water tension will change or not? Because penny surface area is not large, if replaced by a larger surface area or smaller objects, water surface tension will change?
Finally, if the experiment was repeated, some changes to improve the experimental design could be don’t change the penny and water, and then can be more in touch some take the reagent testing, can also change the beaker and add a little water in the beaker, because the rubber head behind the dropper to the water pressure is not enough, water is not very convenient.
Example:
This experiment investigated whether or not gender affected short-term memory. In order to study this problem participants were asked to memorize 25 words. In this experiment, females, on average, remembered 14 words, which is 56%. Male participants averaged 9 words, which is 36%. Results showed a definite relationship between gender and short-term memory. This proved that the hypothesis that gender does affect short-term memory was supported.
To extend this experiment, many different variables could be tested. An interesting way to do this experiment would be to use a large poster board with all of the words written on it instead of using individual pieces of paper. An interesting experiment might be to investigate the effect of music on short-term memory. Testing if certain age groups remembered more than others would be another idea of how to extend this experiment. The use of color and how it affects short-term memory is also a fascinating experiment for one who wishes to continue experimenting on this topic.
This project can be used in the real-world because memory is incredibly important to everyone. Without memory, humans would not be able to do all of the amazing things they are currently able to do. For example, people could not hold down a job if they could not remember how to travel from their home to their work place. Sports would be impossible if no one could remember the rules. Students could not graduate from high school if they could not remember daily lessons. Memory allows people to lead a normal day to day life. It is interesting to wonder if perhaps humans are only using a fraction of a person’s memory power. Perhaps further experiments can increase memory capacity a thousand times. Think of what could be accomplished then! Besides the benefits people would all enjoy by enhancing current memory abilities, experiments on memory can especially be applied to people who have suffered a brain injury and need help regaining both their short and long term memory.
Questions about the experiment include whether or not the results of the experiment would differ if there was a focus on specific cultures. While it was discovered that females have better short term memories in Canada, would this be the case in Australia? Results would most likely be similar to the Canadian based experiment. Also, another question could involve looking at if the time of day affects short term memory. Are people more alert in the morning after a full night’s sleep? Are they less alert at the end of the day?
Finally, if the experiment was to be repeated, the experimental design could be improved if the number of people asked to participate were increased to at least 20 females and 20 males. As well, increasing the font size of the letters in the words they were asked to memorize would be beneficial as some test subjects had difficulty reading the font size.