1. The Scientific Method Systematic study Method of verification
Common among all scientists

2. Steps of the Scientific Method

3. Observations Qualitative Data Quantitative Data The five senses
Numerical information

4. Qualitative or Quantitative?
The substance is yellow
The unknown has a boiling point of 123 degrees Celsius
Sulfur has a pungent odor
Sodium Nitrate has a density of 2.26 g/cm3

5. Hypothesis Testable statement or predication Based on observations
Tentative explanation of events

6. Experiments Set of controlled observations that test the hypothesis
Must be carefully planned and conducted
Test one variable at a time

7. Variable Quantity or condition that can have more than one value
Examples?

8. Two Variables Independent Variable Dependent Variable
The one you plan to change
Should be the only thing affecting the dependent variable
Dependent Variable
The one you did not change
Changes in response to independent variable

9. Control Valuable to experiment Standard for comparison
Helps you better understand the behavior of independent and dependent variables

10. Conclusion 1st: Analyze the data gathered during the experiment.
2nd: Apply analysis to your hypothesis
3rd: Make a judgment based on the information

11. Hypothesis: Never proven, only supported by an experiment
Theory: Must be supported by many, many experiments
Scientific Law: a relationship in nature that has been proven by many scientists many times without exceptions