The Effect of Aspirin Concentrated Water on the Growth of Plants Tim Ko

Problem Statement Will the presence of aspirin concentrated water in soil affect the growth of plants?

Hypothesis If an aspirin concentration of water is increased, then plants will grow at a slower rate.

Background Information What is Aspirin? How to Find the Concentration of Aspirin Best Environment Tomato (Lycopersicon esculentum)

Design Diagram Title: The Effect of Aspirin Concentrated Water on the Growth of Plants Hypothesis: If an aspirin concentration of water is increased, then plants will grow at a slower rate. IV : Aspirin Concentration of Water Levels Water (0 g/L) - control 5 g/L 10 g/L 15 g/L Trials 10

Design Diagram (cont.) DV: Height of Plants (cm) CONSTANTS: type of soil, amount of soil, type of pots, water (tap), amount of water, type of plant, same environment, planting procedure, depth of seed, same type of aspirin

Materials Miracle Grow Soil Tomato Plant Seeds Water 40 100 mL pots Cups Aspirin Ruler Clock Mortar Pestle Scale Spoon Graduated Cylinder (100 ML)

Procedure 1) Plant 40 pots of tomato plants. 2) Label 10 of the pots ‘control’ and label 10 of the pots for each IV (5 g/L, 10 g/L, 15 g/L) 3) For 10 of the pots, water daily with 20 mL of tap water (control). 4) Dissolve aspirin (5 g, 10 g, 15 g) in 1 liter of water.

Procedure (cont.) 5) Water respectively with 20 mL of water. 6) Observe and record the growth of the plants for 4 weeks. 7) Record observations in a data table.

Safety Cautions Do Not Consume Any Materials Used in this Experiment!

Before the Experiment

During the Experiment

After the Experiment

Results Trials Control (cm) 5 g/L (cm) 10 g/L (cm) 15 g/L (cm) 1 7.4 3.6 2 12.9 4.2 2.6 3 10.1 2.4 1.5 4 10.2 0.4 5 8.4 2.2 1.6 6 8.5 3.8 1.8 7 8.3 4.3 0.8 0.2 8 3.7 2.1 9 7.6 3.3 0.9 10 2.9 0.3 Average 8.97 1.39 0.05

Average Calculations Control : 7.4 + 12.9 + 10.1 + 10.2 + 8.4 + 8.5 + 8.3 + 8 + 7.6 + 8.3 = 89.7 / 10 = 8.97 5 g/L : 3.6 + 4.2 + 2.4 + 2.6 + 2.2 + 3.8 + 4.3 + 3.7 + 3.3 + 2.9 = 33 / 10 = 3.3 10 g/L : 2 + 2.6 + 1.5 + 0.4 + 1.6 + 1.8 + 0.8 + 2.1 + 0.9 + 0.2 = 14 / 10 = 1.39 15 g/L : 0 + 0 + 0 + 0 + 0 + 0 + 0.2 + 0 + 0 + 0.3 = .5 / 10 = .05

Results (cont.)

Statistical Analysis(ANOVA) Control 5 g/L 10 g/L 15 g/L Mean 8.97 cm 3.3 cm 1.39 cm 0.05 cm Sample Size 10 Standard Deviation 1.665 0.744 0.785 0.108 # of groups 4 Control : 7.4 + 12.9 + 10.1 + 10.2 + 8.4 + 8.5 + 8.3 + 8 + 7.6 + 8.3 = 89.7 / 10 = 9 5 g/L : 3.6 + 4.2 + 2.4 + 2.6 + 2.2 + 3.8 + 4.3 + 3.7 + 3.3 + 2.9 = 33 / 10 = 3.3 10 g/L : 2 + 2.6 + 1.5 + 0.4 + 1.6 + 1.8 + 0.8 + 2.1 + 0.9 + 0.2 = 14 / 10 = 1.4 15 g/L : 0 + 0 + 0 + 0 + 0 + 0 + 0.2 + 0 + 0 + 0.3 = .5 / 10 = .05

Statistical Analysis (cont.) Source of Variation Sum of Squares Degrees of Freedom Mean Square F-test Statistic Aspirin Concentration SSTR = 462.94 3 MSTR = 154.31 FData = 160.74 Error SSE = 35.58 37 MSE = .96 Total SST = 498.52 5 g/L : 3.6 + 4.2 + 2.4 + 2.6 + 2.2 + 3.8 + 4.3 + 3.7 + 3.3 + 2.9 = 33 / 10 = 3.3 10 g/L : 2 + 2.6 + 1.5 + 0.4 + 1.6 + 1.8 + 0.8 + 2.1 + 0.9 + 0.2 = 14 / 10 = 1.4 15 g/L : 0 + 0 + 0 + 0 + 0 + 0 + 0.2 + 0 + 0 + 0.3 = .5 / 10 = .05

Statistical Analysis (cont.) Total Sample Size = 40 Avg of All plants = 3.428 cm SSTR = 10(8.97 - 3.428)2 + 10(3.3 - 3.428)2 + 10(1.39 - 3.428)2 + 10(.05 - 3.428)2 = 462.94 SSE = 9(1.665)2 + 9(.744)2 + 9(.785)2 + 9(.108)2 = 35.58 SST = 462.94 + 35.58 = 498.52 MSTR = 462.94/3 = 154.31 MSE = 35.58/37 = .96 F-value = 154.31/.96 = 160.74 Critical Value = 2.79

Conclusions Results support hypothesis Experiment shows significant results based on statistical analysis.

Types of Errors Initial Planting Procedure Inconsistent Watering of Plants Different Environments

Improvements Keep all constants as “constant” as possible More trials Longer Experiment Time Precise measurements

Extensions / Applications Experiment with other common medicines. Be aware of where I dispose of medicine. Prevent others from making the same mistake.

Acknowledgements Mom and Dad Mrs. Pietrangelo Ms. Paine

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