VDA#6
1. Scientists predict that prune fingers may serve a purpose. What purpose do they suggest prune finger serve? Scientist predicts that prune finger may serve a purpose because it improves our fingers’ ability to grasp wet, slippery objects.
2. Do you think that the study performed in
Yes, I think the study preformed in
3. How would you design an experiment to gather more data to support the suggestion that prune fingers serve a purpose? (Be sure to include the number of people sampled, the independent and dependent variables and the duration or amount of time for your experiment.)
For this experiment I would have 20 volunteers. I would have regular temperature water for the volunteers to submerge their hands in. each individual participant well have both of their hand submerged in the water. Each participant well soak there hand in the water for about 30 min. after the process is done they would use both of their hands to move objects such as glass, cardboard box and a ball. I well time how long it takes each participant to place the object from one place to other. I well time them for about 5min depending on how far the place is. On the next day I would have the same volunteers but this time both of their hands well be dry, they well do the same process as the one before. Then I well compare the result for each experiment. My independent variable is Freshwater. My dependent variables would be the time that was set for the volunteers to put an object from one place to another.
4. While scientists are attempting to determine the biological purpose for prune fingers, the article does not discuss why prune fingers happen in the first place. What biological process allows for the skin on our hands and feet to turn wrinkly when submerged in water for long periods of time?
The biological process that allows for the skin on our hand and feet to turn wrinkly when submerged in water for a long period of time is osmosis.
Redo.
ReplyDeleteFor your experiment, your independent and dependent variables are incorrect. You should only have ONE independent variable (hint: one of the two you listed is correct). Secondly, you have the volunteers use left and right hands, which I understand (it's important to use the same volunteers, and I like where you were going, but...), some people are right-handed, some are left-handed and some are ambidexterous (neither hand is dominant). That said, how do you think that would effect your results? You may want to change your experimental design to reflect that realization.
For number four, I'm looking for a one word-answer.
Also results have nothing to do with an experiment's validity.
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