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44. Krissy thinks that Skin-So-Soft by Avon will repel mosquitoes. She takes 100 mosquitoes and puts them in a container, half the container contains a cloth soaked in skin-so-soft. After one hour she made observations, she found that 90 mosquitoes were on the half of the container without the rag and 10 were found near the rag. Krissy also put 100 mosquitoes into another container; half of this container contained a rag soaked in water. She observed this container an hour later and found the mosquitoes were evenly distributed across the container.
a. Write a hypothesis for Krissy.
b. What was the control group?
c. What was the independent variable?
d. What was the dependent variable?
e. What should Krissy conclude?

45. Which axes are the independent and dependent variables found?

46. Explain why the results of one experiment are never really final results.

47. Explain how the accuracy of your observations might affect how you develop a hypothesis.
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1 Answer

44a.  Krissy believes Skin-So-Soft (abbreviated to SSS from now on) will repel mosquitoes, so her educated guess/hypothesis will be:  Mosquitoes will avoid the cloth soaked in SSS.
 
44b.  The control group is the mosquitoes in the container without the the SSS-soaked cloth.
 
44c.  The independent variable is the cloth; one soaked in SSS and one plain.
 
44d.  The dependent variable is the mosquitoes' distance away from the cloth.
 
44e.  Since she believes the SSS cloth will repel mosquitoes, her conclusion should reflect her hypothesis.
 
45.  The x-axis is always the constant.  The independent will be the x-axis and the dependent will be the y-axis.
 
46.  The results of one experiment are never the final results because an experiment must be able to be recreated in order to be scientific and since it -- at best -- will be considered a theory, a theory is no law and therefor open to scrutiny which could possibly disprove it.  A theory is peer-reviewed and the most concise explanation of a field of study (like the Cell theory in Biology) but it is not a law.  Hint:  a theory cannot become a law and vice versa.  There is always the chance that new data can be discovered through new experiments.
 
47.  This can be best answered with the scientific method.  Your observations come after your hypothesis.  Once you have run your experiment and have your empirical data, you may go back and alter your original hypothesis.  This is the essence of critical thinking in science.