Experimental Design

          Experimental Design is a fancy way of saying "writing, conducting, and analyzing an experiment". There are a few very important things you need to remember when writing an experiment, like forming a good testable question.

          When you write a testable question, you need to make sure it has enough details to perform the experiment. It needs to have the type of data you are collecting and the two different variables. Here is a bad example and a good example of testable questions:

Will the salt stick to the balloon?

Which staticy balloon will attract more salt, the big one or the small one?

           The good example has the type of data ["amount"= quantitative], and the two variables [Independent: size of balloon; Dependent: amount of salt]. The Independent Variable is what you change and the Dependent variable is what is measured in any experiment. Try writing your own testable question!