1. The Scientific Method

2. What Is Science?
SCIENCE is an organized way of using evidence to learn about the natural world. Experimental research is used to answer scientific questions by testing a hypothesis through the use of a series of carefully controlled steps. The steps taken to answer scientific questions are known as scientific methods.

3. The Scientific Method
Step 1: Recognize/identify the problem Step 2: Form a hypothesis Step 3: Test the hypothesis Step 4: Analyze the data Step 5: Draw conclusions Step 6: Communicate the results

4. Hypothesis
A HYPOTHESIS is a prediction or statement that can be tested. - Is always a statement, never a question - Often contains the words “if” and “then” - Is what is being tested in the experiment - The results of the experiment will either confirm or refute the hypothesis

5. Variables
In well-planned experiments, one variable is changed at a time. To run a proper experiment, you must make sure every variable remains the same except for the one you are testing. The INDEPENDENT VARIABLE is the variable being changed - When being graphed, the independent variable is plotted on the X-axis The DEPENDENT VARIABLE is the factor being measured - When being graphed, the dependent variable is plotted on the Y-axis A CONTROL is a sample that is treated like the other experimental groups except that the independent variable is not applied to it

6. What Every Valid Scientific Experiment Must Contain
A testable hypothesis Adherence to the hypothesis Must be repeatable by others Minimal factors being tested (ideally only one factor) Controls Data to support the results Sufficient sample size A logical conclusion based on the results