To back up the test results of the first test. (Same as recounting)
An experiment which can be repeated and will yield the same results. Ex. If x+y=z in the experiement if you try the experiment again you should get the same result "z".
so that you can see actual results without any distabences
Use a pen and paper, observe the reactions in the experiement and record it in minor ditails.
1. Observe 2. Form Hypothesis 3. Gather Data 4. Perform Experiement to test you hypothesis 5. Record Results Might wanna stick one.
The 2009 calendar will repeat in 2015.