IB 203 1st Edition Lecture 4 Outline of Last Lecture I. Climate Change a. Concept MapII. ResponsesIII. Reading a scientific paperOutline of Current Lecture IV. Forming a hypothesisV. Single factor experimentationCurrent LectureForming a Hypothesis:1. Begins with an observation: something that an investigator notices that triggers a questionEx. Some seeds do not germinate2. Determine a factor: a potential cause of the observationEx. Lack of moisture causes some seeds not to germinate3. HYPOTHESIS: IF… Lack of moisture causes some seeds not to germinate,4. PLAN AN EXPERIMENT AND PREDICT RESULTS]5. PREDICTION: THEN… the seeds that are given extra moisture will germinate more.6. Assumption: Moisture is the only variable affecting germinationSingle factor design for a controlled experiment:1. What is the Independent variable?: amount of water give to each seed2. How many treatments?: 3 (10 mL, 20 mL, 30 mL) and one control (0mL)3. What is the control treatment?: no water4. What is the result?: As the amount of water given to each group increased, the percentage of seeds that germinated also increased.5. Is the evidence direct?: yes6. Has causation been demonstrated?: yesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.7. Has the hypothesis been proven?: NO the hypothesis has been SUPPORTED, but since there could be several other facts outside of your knowledge that are contributing, the hypothesis CAN NEVER DEFINITIVELY BE SUPPORTED.8. What other factors can affect germination?: Amount of light, quality of soil, seed health. 9. Are hypotheses mutually exclusive?: No there can be multiple correct causes of a
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