Scientific Method & Experiments.

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Presentation transcript:

Scientific Method & Experiments

Scientific Method Do scientists follow the scientific method? Why have a method? http://www.sciencebuddies.org/science-fair-projects/project_scientific_method.shtml

Experimental Design Elements of an experiment: 1) Hypothesis 2) Variables: Independent & Dependent D = dependent variable R = responding variable Y = graph information on the vertical axis M = manipulated variable I = independent variable X = graph information on the horizontal axis 3) Constants 4) Control group 5) Repeated trials

Questions Why do we need a “control”? Why is there only one element of the experiment that changes? Here is an example of a hypothesis. Identify the independent variable and the dependent variable: If the amount of fertilizer is increased, then the average plant height will increase.

Credits http://www.therisetothetop.com/davids-blog/entrepreneur-mad-scientist-artist/ http://www.docstoc.com/docs/16824861/Sample-Completed-Experimental-Design-Diagram