By Cheryl Randall Purpose: How does the magnitude of vibrations affect the amplitude of a seismograph? In a few words tell what you already know or have found about the problem that will let you make an educated guess. This is your background information from the text essays about dogs, teacher, or other sources. It gives the reader an understanding of underlying principles and content information of the laboratory. Scientists know that lab reports are a very important part of every experiment. The purpose of an experiment is to answer a question by testing a hypothesis. During an experiment you may collect a lot of information essay acceptance, or data. But that data is not very useful unless it is organized. The purpose of a lab report is to organize and communicate what you did in your experiment. A good lab report explains exactly what you have done. It can be used to repeat the experiment or to test other hypotheses in new experiments. Observations and Data: Cheryl also suggests that the basic format suggested by Dr. Wile: Title, Date writing application letters for jobs, Observations/Data, and Conclusion/Summary is adequate for 7th, 8th and 9th graders and the full format for documentation that she suggests above is optional. What do you expect to find? The hypothesis can be stated as an "If. then. " statement. The 'If' part of the statement is based on related facts that you know to be true. The 'then' part of the statement is an educated guess on the outcome of the experiment. The hypothesis does not have to guess the correct outcome, but the experiment must be set up to test the hypothesis. Title: ______(the name of the lab or experiment) The "Procedures words to use in an essay conclusion," often called the "Methods," discusses how the experiment occurred. Documenting the procedures of your laboratory experiment is important not only so that others can repeat your results but also so that you can replicate the work later, if the need arises. Historically, laboratory procedures have been written as first-person narratives as opposed to second-person sets of instructions. Because your audience expects you to write the procedures as a narrative virginia polytechnic institute and state university thesis, you should do so. When the procedure is not standard, the audience would expect more detail including theoretical justification for the steps. Given below is such a procedure--this one for an experiment devised to determine whether the frictional torque associated with a multi-turn film potentiometer is strictly the Coulomb friction between the slider and the film [Counts, 1999]. The "Introduction" of a laboratory report identifies the experiment to be undertaken, the objectives of the experiment, the importance of the experiment, and overall background for understanding the experiment. The objectives of the experiment are important to state because these objectives are usually analyzed in the conclusion to determine whether the experiment succeeded. The background often includes theoretical predictions for what the results should be. (See a sample "Introduction .") The heart of a laboratory report is the presentation of the results and the discussion of those results. In some formats, "Results" and "Discussion" appear as separate sections. However high school paper topics, P.B. Medawar [1979] makes a strong case that the two should appear together, particularly when you have many results to present (otherwise, the audience is faced with a "dump" of information that is impossible to synthesize). Much here depends upon your experiment and the purpose of your laboratory report. Therefore, pay attention to what your laboratory instructor requests. Also, use your judgment. For instance, combine these sections when the discussion of your first result is needed to understand your second result, but separate these sections when it is useful to discuss the results as a whole after all results are reported. In discussing the results, you should not only analyze the results, but also discuss the implications of those results. Moreover strictly ballroom essay film techniques, pay attention to the errors that existed in the experiment write term papers, both where they originated and what their significance is for interpreting the the reliability of conclusions. One important way to present numerical results is to show them in graphs. (See a sample "Results and Discussion" section .) where a is the acceleration of the mass. If the assumption holds that the only friction affecting the potentiometer was constant Coulomb friction, then each mass would undergo a constant acceleration. Correcting for our water results this made our measurements –15.2 and 17.4 after the corrections. Overall the lab was really good and we learned quite a lot of stuff. I especially liked the part where the blabber gas exploded when heated scaring my partner (I think that may be why she broke the thermometer). The only criticism of the lab is that the equiptment wasn’t really great and that we ran out of time but otherwise it was a really good experinence and I think it taught us a lot of chemistry. The pressure in the room was 761.2 and the temperatures we measured for our unknown were: The Barometric pressure in the lab was measured to be 761.2 mmHg. Based on these data we conclude that our sample was probably “Farsel Juice” since both the melting and boiling points fall within the confidence limits of our average melting and boiling points. Additional evidence to support our conclusion is that Farsel Juice is described in the Chemical Handbook as having a yellowish-orange in color and has a “peach-like” smell. Our unknown was this color and one of our group members observed a “fruity” smell when she opened the bottle. A. Student
0 Comments
Leave a Reply. |
ArchivesCategories |