Overview of the Scientific Method
The scientific method is a process for experimentation that is used to explore observations and answer questions. Scientists use the scientific method to search forcause and effectrelationships in nature. In other words, they design an experiment so that changes to one item cause something else to vary in a predictable way.
Just as it does for a professional scientist, the scientific method will help you to focus your science fair project question, construct a hypothesis, design, execute, and evaluate your experiment.