An abstract serves as the summary of your paper. It should contain brief explanations of what the objectives of your study were, how you conducted the study, what your results were, and how they were significant. This section should be written carefully because it is the section readers will browse before deciding whether they'd like to read more of your paper.
The introduction should explain why you are interested in the current study and how it relates to earlier, previously published studies. This section of your paper should describe your experiment and what question you were testing by conducting that experiment, an explanation of why this question is important, and the approach you will take in answering that question. Write this section in detail in case your reader is not familiar with your technique.
The methodology section provides the details necessary for any other scientist to duplicate your work. This section should describe your process and each step you took in your experiment. Describe your techniques, your materials and any published protocol you may have used, as well as any changes you may have made from that published work. Do not write at length, but indicate the relevant information about the experiment.
Your results should be a multi-paragraphed section of your paper, where each paragraph addresses each question you brought up in your introduction. San Diego State University has published guidelines suggesting that you should write the opening sentence of each paragraph in bold for emphasis. Do not present all the raw data that you collected, but instead summarize your findings as they pertain to each question. You may list results or present them in a numbered table.
The discussion section allows you to be more abstract, Here, you explain what the results of your experiment mean and how they differ from results of past experiments. George Mason University has published guidelines suggesting that you interpret your findings in light of other published results. Be careful not to make statements that are too broad; limit your conclusion to include only data you can support. Take this opportunity to suggest further research to your reader.
The last section of your paper should be used to list all the works that you cited in your paper, not necessarily all the work you referenced for your experiment. According to The University of Chicago's library page, "Disciplines in the sciences use a variety of style manuals and many science publications use their own unique styles." Reserve full names and titles of your references for the citation section. Do not write out the complete titles in the body of your text; condense them as directed by whatever style manual you are using.