The scientific method is a method for conducting an objective investigation. The scientific method involves making observations and conducting an experiment to test a hypothesis. The number of steps of the scientific method isn't standard. Some texts and instructors break up the scientific method into more or fewer steps. Some people start listing steps with the hypothesis, but since a hypothesis is based on observations (even if they aren't formal), the hypothesis usually is considered to be the second step. Here are the usual steps of the scientific method. Scientific Method Step 1: Make Observations
You may think the hypothesis is the start of the scientific method, but you will have made some observations first, even if they were informal. Scientific Method Step 2: Propose a Hypothesis
It's easist to test the null or no-difference hypothesis because you can prove it to be wrong. It's practically impossible to prove a hypothesis is correct. Scientific Method Step 3: Design an Experiment to Test the Hypothesis When you design an experiment, you are controlling and measuring variables. There are three types of variables: * Controlled Variables
You can have as many controlled variables as you like. These are parts of the experiment that you try to keep constant throughout an experiment so that they won't interfere with your test. Writing down controlled variables is a good idea because it helps make your experimentreproducible, which is important in science! If you have trouble duplicating results from one experiment to another, there may be a controlled variable that you missed. * Independent Variable
This is the variable you control.
* Dependent Variable
This is the variable you measure. It is called the dependent variable because it depends on the independent variable. Scientific Method Step 4: Test the Hypothesis
Scientific Method Step 5: Accept or Reject the Hypothesis
Scientific Method Step 6: Revise the Hypothesis (Rejected) or Draw...
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