Then, through repeated experimentation, the hypothesis can either be proven false or become a theory.
The short answer is that the research paper is a report summarizing the answers to the research questions you generated in your background research plan.
It's a review of the relevant publications (books, magazines, websites) discussing the topic you want to investigate.
The long answer is that the research paper summarizes the theory behind your experiment.
Science fair judges like to see that you understand why your experiment turns out the way it does.
If there isn't a required format, you'll need to choose from one of two possible types of abstracts. The abstracts at Pub (National Institutes of Health database) are informational abstracts.
A random example is this abstract on the effect of coffee consumption on Acute Coronary Syndrome.
Index to the Writing a Scientific Paper Subject Guide.
This guide contains both UCI Libraries' restricted resources* as well as publicly accessible ones.
This Furthermore, flies were observed laying eggs where the maggots formed.
Thus, he concluded that maggots are the result of flies, not spontaneous generation.