Controlled Variables: Type of plant, amount of water or tea given to the plants after the first day, amount of time that each plant has to grow, the size of the flower pot, the amount of soil put into each flower pot
Manipulated Variable: What the plants are being watered with (tea)
Responding Variable: How tall the pea plants grow
Experimental Control: The three water-grown pea plants
My hypothesis was supported. Based on the data, tea-grown plants grow at a faster rate than water-grown plants. The overall average of the tea-grown plants was 46.7 centimeters, while the overall average of the water-grown plants was 43.8 centimeters. If I wanted to increase the validity or quality of my investigation, I could either increase the number of days the plants grew, or have more plants to increase to number of trials. This investigation is helpful to a real human problem because it can determine what would be best to water plants with, if you want them to grow at a fast rate.
The process of this lab wasn't too difficult; there were no frustrations or problems that I ran into during this investigation. I remembered to check the plants everyday and I wasn't surprised at the results at the end of this lab. If a person wanted to grown plants, especially pea plants, at a faster rate, nettle tea would be a good choice to water them with.