This experiment studies the impact of caffeine on plant growth. By watering plants with caffeine solutions and comparing their growth to a control group, students can learn about the effects of this common stimulant.
If plants are watered with caffeine solutions, then their growth will be stunted compared to plants watered with regular water.
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Fill each pot with the same amount of potting soil.
Plant the same type of seeds in each pot.
Prepare caffeine solutions by dissolving coffee/caffeine tablets in water in different concentrations.
Water one pot with pure water (control) and others with varying caffeine concentrations.
Label each pot with the treatment type.
Place pots in a sunny location and ensure they receive equal water and light.
Measure plant growth weekly with a ruler.
Record observations in the notebook.
Analyze plant height and health at the end of the experiment.
Prepare a presentation summarizing findings and conclusions.
It is expected that plants watered with higher caffeine concentrations will show reduced growth compared to the control group, supporting the hypothesis on the negative effect of caffeine on plants.
caffeine concentration in water
growth measurements of plants
type of seeds, amount of soil, light exposure
Use caution with caffeine solutions to avoid spills. Wash hands after handling coffee or tablets.
Create graphs to compare growth rates across different treatments.
Discuss how caffeine affects biological systems in plants.
Incorporate visuals of plant growth stages.
Engage the audience by discussing everyday caffeine use.
Prepare to answer questions about your methodology.
