I'll be answering (2)
It depends, but naturally, research on certain topics peak the interest of the researcher, they'll ask more and more questions to themselves about the topic and end up experimenting to find out the answers or to prove their point.
answer:Does a research ends in a Experiment
No, because we need to analyze the data after the experiment
theres an step of the scientific method:Statement of the ProblemFormulation of Hypothesis Testing/ Experimentation Analysis of DataDrawing of ConclusionCommunicate the Results
If your Hypothesis is true you need to repeat it several times to make sure.
If you Hypothesis is false you need to modify your hypothesis.
ang kasingkahulugan nito ay mapili.