To create a fair test, all the conditions (variables) must be kept the same (constant) except for the variable being investigated. Scientists call this type of investigation a controlled investigation. They try to find out what variables make a difference by changing them one at a time and comparing the results with a control—the part of an experiment that remains the same. This chapter features a fair test using hairsprays. It also proposes some questions to give an opportunity to design some fair tests on your own.
Details
Type Book ChapterPub Date 11/15/2012ISBN 978-1-936959-20-4Stock # PB328X4_5