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.
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
f) I must be well supported by observations and experimentations