# The purpose of this experiment essay

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There are two main types of scientific experiments commonly used in science fair projects: The Controlled Experiment The purpose of a controlled science experiment is to find out what happens to something if you change something else while you keep all other things unchanged.

Say you want to test the effect of a certain fertilizer on radish plants growth. For this you need to create two groups of radishes: The two groups are treated the same irrigation, light, etc. The fertilizer applied is called the independent variable independent of any experiment factor and is decided only by your free choice whereas the result, the growth rate of the radishes in the experimental group, is called the dependent variable the outcome depends on the independent variable.

In an controlled experiment you can test only one independent variable. That means that you can only change one condition in your experiment. If there's more than one independent variable in an experiment it becomes flawed.

If you want to test another independent variable, you'll have to conduct another experiment. For example, if in our experiment, in the experimental group, besides the fertilizer also the amount of light is not the same as in the control group then it's impossible to deduce which condition affects the radish plants growth - the fertilizer or maybe the light intensity.

The Comparative Experiment The purpose of a comparative experiment is to compare the effect of two or more different things on something.

Suppose you want to investigate the effect of irrigation method flood, spray or drip on the growth rate of radishes. In this experiment you need three experimental groups, each for every irrigation method flood, spray or drip and in this case you don't need a control group at all.

In this experiment the irrigation method is the independent variable and the resulting growth rate of the radishes is the dependent variable. Treat each group of plants the same light, water quantity, nutrition, cultivation, etc.

In an comparative experiment you can test, of course, the effect of a few independent variables but not in the same experimental group where also only one independent variable is allowed as in the case of a controlled experiment.

The Sections of an Experimental Science Fair Project Report That's a general science fair project outline requested by most teachers, competitions and judges.

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Table of Contents List your project sections and their corresponding page numbers. Abstract In words or less detail in brief the experiment purpose, procedures, results, and conclusions. The goal is to present the reader a quick and clear understanding of your work. In other words, a good promo that will trigger the reader to read further.

That is the last part of your project that you will write. Research Report This section displays the background information you gathered from books, magazines or the Internet that helped you to understand the topic and determine the purpose and hypothesis of your experiment. Purpose Here you detail the problem you were trying to solve, its importance and benefits to society, to science, etc.

The Tuskegee Study of Untreated Syphilis in the Negro Male, also known as the Tuskegee Syphilis Study or Tuskegee Syphilis Experiment (/ t ʌ s ˈ k iː ɡ iː / tus-KEE-ghee) or the United States Public Health Services Study of Untreated Syphilis in Black Males was an infamous, unethical, and malicious clinical study conducted between and by the U.S. Public Health Service. Essay writing is a crucial part of the modern academic system. However, the thing is, just because a thing is ubiquitous doesn’t mean it’s easy to do. Turnitin provides instructors with the tools to prevent plagiarism, engage students in the writing process, and provide personalized feedback.

Research Question The research question is a focused question that states what the study will investigate.

A research question might be: Hypothesis The hypothesis gives a supposed hypothetical answer to the research question. In other words, the hypothesis details in short your expectations from your experiment or what are the supposed outcomes or results.

Suppose your research question for an experiment is, "what is the effect of the irrigation method flood, spray or drip on the growth rate of radishes?EDTA Experiment Essays: Over , EDTA Experiment Essays, EDTA Experiment Term Papers, EDTA Experiment Research Paper, Book Reports.

ESSAYS, term and research papers available for UNLIMITED access Order plagiarism free custom written essay Purpose: The objective of this experiment were: a) to review the concept of simple acid. Explaining the overall purpose of the experiment is the most important part of the introduction and is generally used to conclude this section (Pechenik, p.

95). In the examples presented here, the reports are written on experiments rather than studies. AP Biology Essay Questions The following is a comprehensive list of essay questions that have been asked on past AP exams. The questions are organized according to units.

Explain the purpose of each step of your procedure. Describe how you could determine whether the gene was successfully incorporated.

Design an experiment to.

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