Benchmark work!! Come prepared
Monday- Science STAR test baby!! You are going to rock it!
Wed- take survey http://www.stanford.edu/group/salli/sullivan/sullivan/home
Thursday- take survey http://www.stanford.edu/group/salli/sullivan/sullivan/home
Computers CST Review
Work on benchmark
Energy Guided Notes
Please work on cover letters over break!
Final Lab Report Due Friday 12:00 AM (midnight!)
In order to turn in you need to
1) email me subject line either
"Certify and Grade"- if you want it certified
"Grade"- if you just want a grade
To upload on the digital archive, the title is
"2012-1013- How does our body respond to external stimuli?"
For the Reflection
The unit is 4- Anatomy/physiology
EQ- What mechanisms do organisms posses to maintain homeostasis as they have evolved to multi-celluar organisms with complex tissues and organ systems
Discussion Due on Tuesday
Discussion:I was not surprised by the results, although I was surprised that the results proved my hypothesis correct. I originally thought that if the skin receives a stimulus and felt only one point, then it would be considered sensitive. I was incorrect in assuming that, for if the skin receives a stimulus and feels two points, (and there are really two points), then it is sensitive. The part of skin is sensitive when it can feel the two points, especially when it is close together. What happened to my experimental subjects is that the compass touched their skin. There are sense receptors in the skin; the sense receptors received a stimulus, (the poking of the compass). Then they sensory neurons sent a message to interneurons. The interneuron sent a message to the brain. Therefore the person felt something. Once the message reached their brain, they answered with how many points they felt. I would say that the accuracy of this experiment was high. I don’t think it is extremely and highly accurate, but mostly accurate. Most of the data were the same; only a few outliers. I think there were other factors, beside my independent variable that could have affected my results.I think the factor was that people saw what they would be poked with affected the results. It was not something meant to be seen, but there was one laying on the table that anyone who saw could have guessed and known that they would always feel two points. One possible source of error that could have yield unreliable results is a disruptive test subject during the end of our lab that saw what was happening. The affect was telling me I was doing something wrong and made myself repeat part of the lab. Another source of error could have been poking one part of the compass instead of both, by accident. The affect of this accident that could have happened is how many points the test subject felt, which would have been only one. Another source of error that occurred was the disruptive experimental subject. He watched as other two subjects were being tested, which was a big mistake because he was aware that there would always be two points. I consulted to subject to ignore that stimulus, told the disrespectful kid to quit, and continued my experiment. One thing I would change in this experiment is to make sure no one sees anything happening during the experiment. This is important so the test subjects waiting aren’t aware of what will be happening. Another thing I would change is that area that is being poked. I think they were fine and easy, but I would like to see how it would look in chunkier areas of the body. Another related experimental question I could have investigated for further knowledge is how the fat of certain areas are more sensitive or less
My experimental question in this lab was How does the temperature effect type efficiency? My hypothesis in this lab stated that, “If a student has cold hands, then it would decrease their activity and type slow, because it is more difficult to move in low temperatures.” The results in the data tables and graph actually supported my hypothesis. During the experiment the cold water could have slowed down the test subjects typing because in the cold, people shiver. In order to maintain homeostasis then the body shivers, which may limit mobility enough to change the results in the experiment. As for the hot water, it probably regulated the persons hand temperature which made them able to type faster. When one is warm it possibly allows people to move at their own speed or faster. I think that my experiment was somewhat accurate, but there were some mistakes that could rebuttal my results because it would probably prove something wrong instead. I think that the regular temperature of the persons hand could have affected the result because they could have already been cold or warm. The first source of error is when we were moving the test subjects hands to the computers. This might have affected our results because it could have changed the temperature. The second source of error is the temperature of the water and how the temperature of their hand could not stay consistent. This might have affected the results because the test subjects could have different temperature that would increase or decrease the type efficiency. The third source of error is that the time could have been inaccurate because we used a stopwatch to time them and it would be a human error. This could have affected the results because more time could have given the test subjects some advantage or disadvantage with temperatures. One thing I would change would be the application we used because we could have used a website that would get the time more accurately than stopwatches. The second thing I would change would be to have some practice rounds before we started the experiment because that would give the test subjects more time to get used to the sentence and get more accurate results . Another similar experimental question that could help investigate this topic further could be: How does exhaustion affect typing efficiency?
3/15- Finish Testing ( data table filled in on google doc)
3/20- Graph and caption
3/22- Introduction Complete
3/26- discussion complete
3/29- final lab
Look at email for all the documents you need
AK grade for completing testing this Friday