Parts of the Scientific Method Ask a Question Develop a Hypothesis Experiment Analyze Data Reach Conclusions Form a Theory Repeat

Parts of the Scientific Method Ask a Question Develop a Hypothesis Experiment Analyze Data Reach Conclusions Form a Theory 1) Ask a Question

Parts of the Scientific Method 1. Observe a Problem or Ask a Question Example: Is fire always orange?

Parts of the Scientific Method Ask a Question Develop a Hypothesis Experiment Analyze Data Reach Conclusions Form a Theory 2) Develop a Hypothesis

Parts of the Scientific Method 2. Develop a Hypothesis Example: If the same substance (phlogiston) is emitted by fire, then all fires will be orange.

Parts of the Scientific Method Ask a Question Develop a Hypothesis Experiment Analyze Data Reach Conclusions Form a Theory 3) Experiment

Parts of the Scientific Method 3. Experiment Example: Burn metal chlorides and observe color of flame

Parts of the Experiment Independent Variable – the variable that is changed by the scientist Dependent Variable – the variable that “depends on” the independent variable changing

Parts of the Experiment Control Variables – variables that are kept constant Example: Independent: Which metal is burned Dependent: Color of flame Control: Type of flame, temperature of flame, etc.

Parts of the Scientific Method Ask a Question Develop a Hypothesis Experiment Analyze Data Reach Conclusions Form a Theory 4) Analyze Data

Parts of the Scientific Method 4. Analyze Data

Parts of the Experiment Quantitative Data – data which can be measured; deals with numbers Qualitative Data – data can be observed but not measured; deals with descriptions

Parts of the Scientific Method This data is Qualitative. It does not have numbers.

Parts of the Scientific Method Ask a Question Develop a Hypothesis Experiment Analyze Data Reach Conclusions Form a Theory 5) Reach Conclusion

Parts of the Scientific Method 5. Reach Conclusion Conclusion: Fire does not always burn orange.

Parts of the Scientific Method Ask a Question Develop a Hypothesis Experiment Analyze Data Reach Conclusions Form a Theory 6) Form a Theory

Parts of the Scientific Method 6. Form a theory Theory – an explanation for some phenomenon that is based on observation, experimentation, and reasoning -Must be supported by many experiments done by many scientists The theory of phlogiston (a substance that leaves materials when they burn) was proven false.

Parts of the Experiment Which is the independent variable? (variable changed by the scientist) -Whenever Angela accidentally eats peanut butter, she becomes really sick. 1. Peanut Butter 2. Sickness

Parts of the Experiment Which is the independent variable? -Julie wants to know if the amount of sunlight a plant receives will affect its growth. 1. Amount of sunlight 2. Plant Growth

Parts of the Experiment Which is the independent variable? -A university research group investigates the connection between developing lung cancer and smoking cigarettes. 1) Lung cancer 2) Smoking

Parts of the Experiment Is the data quantitative or qualitative? -Whenever Angela accidentally eats peanut butter, she becomes really sick. 1) Quantitative (numbers) 2) Qualitative (descriptive)

Parts of the Experiment Is the data quantitative or qualitative? -Julie wants to know if the amount of sunlight a plant receives will affect its growth. 1) Quantitative (numbers) 2) Qualitative (descriptive)

Parts of the Experiment Is the data quantitative or qualitative? -A university research group discovers that 80%-90% of all lung cancer deaths are due to smoking. 1) Quantitative (numbers) 2) Qualitative (descriptive)