Question

John took eight seeds and planted them in eight pots that all received equal amounts of sun and were all spaced 20 centimeters apart. Each day John gave each of the eight plants equal amounts of water using a large graduated cylinder, depending on how dry the soil was. John then divided the eight plants into four groups, A-D. For the two plants in Plant Group A, John only gave them water. For the two plants in Plant Group B, John gave each plant a cup of Miracle-Gro solution mixed at 25% less than the recommended concentration once a week in place of the water. For the two plants in Plant Group C, John gave each plant a Miracle-Gro solution mixed exactly at the recommended concentration once a week in place of water. For the two plants in Plant Group D, John gave each plant a cup of Miracle-Gro solution mixed at 25% more than the recommended concentration once a week in place of the water. what is the dependent variable? what is the independent variable? What is the control group for this experiment? What are the constants for this experiment?

Answer 1

Dependent variable: Growth of plants

Independent variable: Amount of Miracle-Gro solution or water given

Control Group: Group A

Constants: type of seed, amount of sunlight received, space set apart