ONE THE RESEARCH QUESTION Central Inquiry: Does caffeine concentration affect the height of Phaseolus vulgaris? Hypothesis: Higher caffeine levels will decrease plant height. TWO METHODOLOGICAL DESIGN Divide 15 identical plants into 3 groups. Group A: Distilled water. Group B: $50mg$ caffeine. Group C: $100mg$ caffeine. THREE DATA COLLECTION PLAN Record height in $cm$ every 48 hours. Use the formula $G = \frac{\Delta h}{\Delta t}$ for growth rate. FOUR ACADEMIC INTEGRITY Use APA style for citations. 1 Ensure identical sunlight. 2 Use blind measuring. 3 Document all outliers in the Science Fair Project.