Question 3
Experiment III. Base your answers to questions 40 and 41 on the information and on the diagram below.
A student set up the experiment below to learn about plant growth. The student added a different amount of water to four identical containers, each containing four seeds in 100 cubic centimeters of soil. All of the containers were placed in the same sunny location.
The four containers have water amounts 0 mL, 10 mL, 20 mL and 40 mL, respectively; each contains 100 cm³ of soil and four seeds. The source does not specify a daily watering schedule.
40. State a hypothesis being tested in this experiment. (4 points)
41a. Identify one variable that is being held constant in this experiment. (3 points)
41b. Explain why this variable needs to be held constant. (3 points)
Original source panels:
A student set up the experiment below to learn about plant growth. The student added a different amount of water to four identical containers, each containing four seeds in 100 cubic centimeters of soil. All of the containers were placed in the same sunny location.
The four containers have water amounts 0 mL, 10 mL, 20 mL and 40 mL, respectively; each contains 100 cm³ of soil and four seeds. The source does not specify a daily watering schedule.
40. State a hypothesis being tested in this experiment. (4 points)
41a. Identify one variable that is being held constant in this experiment. (3 points)
41b. Explain why this variable needs to be held constant. (3 points)
Original source panels: