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In general, lab reports can be completed during class time on the day the lab work is finished. However, if a student is unable to complete the write-up in the allotted time, it may be sent home to be finished.
A lab report will usually contain the following parts:
1. Purpose The intent of the lab procedure; basically, why is the lab being performed and what is the scientist trying to learn?
2. Hypothesis Written in the "if...then" format, this statement sets out the assumed relationship between at least 2 variables. This is the scientist's guess of a cause and effect dependence. It is the question the lab will attempt to answer.
3. Procedure The steps to be performed in the lab are recorded in sequence. They should be clear enough to be followed by another scientist attempting to repeat the lab. These are often provided for the student, and merely need to be copied off the board or read from the handout.
4. Materials A complete list of everything used to complete the experiment.
5. Data and Observations Depending upon the lab, the observations may be in a paragraph, graph format, or a chart. Whichever method is used, this section needs to document all changes observed in a logical, orderly fashion.
6. Conclusion This will have three basic parts. The hypothesis will be restated as a "when...then" statement, based on results found. The results will be summarized as they relate to the "when...then" conclusion. An explanation of the results is the final section. Here the scientist tries to explain why this happened.
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