Question

what should mateo and noah do next to improve their investigation?
change the intensity of the light.
conduct the same experiment several more times.
have another group follow their procedures with different plants.
change the length of time the plants are exposed to light or darkness.
oxygen in an aquatic ecosystem. they placed two aquatic plants (java
moss) in a tank filled with freshwater. they exposed the tank to each
condition for 30 minutes, and recorded the percent dissolved oxygen
using a sensor. before each experiment, they allowed the tank to sit
undisturbed in normal conditions for 6 hours. a graph of their data is
shown below. unfortunately, the students forgot to label their data files,
so they dont know which plant was exposed to which condition.
dissolved oxygen under different light conditions

Explanation:

• Conducting the same experiment several more times helps to check the consistency and reliability of the results. It reduces the impact of random errors or anomalies in a single trial.
• Changing the intensity of the light or the length of time (options 1 and 4) would be introducing new variables rather than improving the current investigation's reliability.
• Having another group follow with different plants (option 3) is more about generalizability rather than directly improving the specific investigation they conducted.

Answer:

Conduct the same experiment several more times.