The O stands for observation so when you what to have an experiment you need to have something to observe. An action or process of observing something or someone carefully or in order to gain information.
P is for a problem. If you want to test someing you need to test someing and the best way to do that is to have problem.
H is for Hypothesis you need to think or have an opinion so you can test it
E is for Experiment you to experiment to get you answer to you question.
R is for Result you need a result because it is you answer to you question and to you experiment.,
C is for conclusion this is also where you would publish what you found or you answer summarize how your results support or contradict your original hypothesis
observations you use your 5 sences. Infrences you use you mind and your opinin
Qualitive is the 5 sences and the qulity of the experiment. Quontitative is the things you use to measure.