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Writing a Lab Report

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Writing a lab report

Many advanced science classes include a lab component. Lab reports are an important part of your grade in these classes. Some teachers provide a format they want you to use when writing a lab report. Here is a format you can follow when your teacher does not provide a format.

Make your title short and to the point (try to keep it less than ten words).  Your title should immediately tell the reader what your report is about. 


The introduction to your report should consist of a single paragraph in which you provide an overview of the experiment you conducted. Write the introduction in a style that will motivate the reader to read the rest of your report. It is important to specify the purpose of your experiment and state your hypothesis in this section.  Include any background information that will help the reader better understand your report.  Include only background information that is pertinent to your experiment.

Materials and Methods

Describe in your own words the procedure you followed to perform your experiment.  Clearly describe all of the steps you completed.  Include information about all of the materials you used to conduct your experiment.  While this section of your report must be detailed, be careful not to overwhelm the reader with too much detail.  A good rule of thumb to follow is that the reader should be able to repeat your experiment without further instructions.  Keep in mind, however, that you are describing what you did in this section, not writing a set of directions.


This section is the “meat” of a lab report.  Here is where you provide the raw data from your experiment (raw data is the actual measured values you recorded during your experiment).  Describe in words what your data means.  Include graphs, tables, and figures as appropriate.  Be sure that any of these visual aids you provide have descriptive titles, and show the units of data entries clearly.

Discussion and Conclusions

In this section you present an interpretation of your data to determine whether or not your hypothesis was accepted or rejected.  You should relate your findings to existing theory and knowledge that is relevant to your experiment. Unlike the Results section, which must be straightforward, you can engage in speculation in this section.  For example, you might talk about how your experiment might have been improved or what might have happened had you changed your procedures in some way.  It is even appropriate to acknowledge any mistakes you may have made.


As for any written paper, you must list all articles or books that you cited in your report. 

Using the format described above will make it easier for you to write a good lab report.

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Writing a Lab Report

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