a)An observation is what you actually see happening. An inference is the conclusions you draw from that observation.
because if you change more than one variable, you won't know which one
was responsible for any observed effect, or indeed whether they both had
a part in it. The worse case of all would be if they both had an
effect but the effects cancelled out.
lots of times it is just not possible to change only one variable, especially when you are observing rather than experimenting. There are complicated mathematical techniques to try and sort things out when more than one variable is being changed at the same time.
c)variable is what your trying to measure, differences between the control and the variable. Something you add to the experiment to get a measurement, control is a group that isn't affected by the variable
1) Come up with a hypothesis
2) Review the relevant work already completed out there with regards to that hypothesis
3) Design an experiment around to test your hypothesis
4) Conduct the experiment and analyze the results
5) Write a experimental report detailing your experiment and results
6) Have your test results independently verified by someone else replicating your experiment
d)Reid used jars, meat, and gauze. The gauze was important because he used it to cover some jars the gauze was his manipulated variable
f) I must be well supported by observations and experimentations
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