Question

lizette works in her schools vegetable garden. every tuesday, she pulls weeds for 15 minutes. weeding seems like a never - ending task. each time lizette goes to the garden, there are just as many weeds as the week before! lizettes teacher suggests that she use a strong solution of vinegar to kill the weeds. vinegar is acidic and prevents plants from maintaining homeostasis. lizette sets up a controlled experiment to test her hypothesis that the solution will kill the weeds without harming nearby vegetables. she plans to spray one group of weeds with the solution and another group of weeds with water as a control. what variables should lizette keep the same between the control group of weeds and the sprayed weeds?

Explanation:

In a controlled experiment, to accurately test the hypothesis, all variables except the independent variable (the vinegar - water solution in this case) should be kept constant. This includes factors like the type of weeds, the amount of sunlight they receive, the soil conditions, and the initial number and health of the weeds. Keeping these variables the same between the control and experimental groups allows for a fair comparison to determine if the vinegar solution is actually killing the weeds.

Answer:

The type of weeds, the amount of sunlight, the soil conditions, the initial number and health of the weeds, etc. should be kept the same between the control group of weeds and the sprayed weeds.