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Study Guide: Scientific Method

Study Guide: Scientific Method. 1. For this experiment : State the problem. Which mouthwash is most effective against bacteria? Identify the independent variable . Types of mouthwash Identify the dependent variable . Bacterial Growth

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Study Guide: Scientific Method

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  1. Study Guide: Scientific Method

  2. 1. For this experiment: • State the problem.Which mouthwash is most effective against bacteria? • Identify the independent variable.Types of mouthwash • Identify the dependent variable.Bacterial Growth • Identify the control group.Circle D: soaked in distilled water • Why is it necessary to have a control group?To compare against experimental group so that we can see the effectiveness of the different types of mouthwashes

  3. 1. For this experiment: • What is the experimental group?Circles A, B, and C • Based on the results (picture), what can you conclude?Mouthwash A appears to be the most effective against bacteria. • If you were to create a graph, the independentvariable goes on the X__axis and the dependent variable goes on the Y axis.

  4. 5. Explain the difference between an observation and an inference. Give an example of each. • Observation: when studying something, describe only facts that you can see, touch, smell and hear. You are not making any guesses. • ex. This study guide tells you to review our concept cards and to study our Cornell Notes. • Inference: using your observations to make a guess about an object or an outcome • ex. The terms on the concept cards and the information on our Cornell Notes is probably on the next test.

  5. 6. Explain the difference between quantitative data and qualitative data. Give an example of each. • Quantitative data is data that can be measured and uses numbers. • Qualitative data is data that is gathered by observation and is descriptive.

  6. 7. For this data: • What is the dependent variable and why? • Glucose in blood is the dependent variable because the amount of glucose is dependent upon time after eating. (Time the body needs to produce insulin) • What is the independent variable and why? • Time after eating is the independent variable. Nothing depends on time. • Which, if any, of the above individuals (A or B) has diabetes?  • Individual B has diabetes. • What data do you have to support your hypothesis?  • Individual B has a blood glucose level elevated above 140 mg/dL nearly the entire 4 hours recorded after eating. His glucose level goes as high as 200 to 250 mg/dL • Individual A, however, had a drop in glucose level over time, to about 140 mg/dL

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