Why Is Distilled Water a Good Control for Science Projects?
Controls and Variables the calculator image by Ilja Ma…¡Ãk from Fotolia.com jQuery(document).ready(function(){ jQuery(‘#jsArticleStep1 span.image a:first’).attr(‘href’,’http://i.ehow.com/images/a07/2c/jt/distilled-good-control-science-projects_-1.1-800X800.jpg’); }); Fair Test In a science project or experiment, a fair test has only one variable. All other aspects of the experiment are kept the same for each test; these are called “controls.” Distilled water is used in science projects because it is purified and and can be considered a standard control. Why Not Tap Water? tap image by Dr.Loop from Fotolia.com jQuery(document).ready(function(){ jQuery(‘#jsArticleStep1 span.image a:first’).attr(‘href’,’http://i.ehow.com/images/a07/2c/jt/distilled-good-control-science-projects_-2.1-800X800.jpg’); }); Tap Water Tap and bottled water contain many different minerals, such as iron and calcium, which vary from one source to another. These minerals may alter the results of a specific test by
