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Lizette’s 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?

Respuesta :

Answer:I think lizette should use the water because the vinegar would kill the weed and the vegetables because it is acidic.

Explanation:

I think lizette should use the water because the vinegar would kill the weed and the vegetables because it is acidic.

The controlled variable that Lizzette should keep is uniform concentration of vinegar solution and same type of weed.

What do you mean by controlled variables?

  • "A controlled variable is anything that is held constant or limited in a research study."
  • This controlled variable is not the main aim to study. It is kept constant because it can influence the result of experiment.

The concentration of vinegar should be same because its dilution or concentrated version may affect he outcome of study. And also same type of weed should used because different types of weed will give different result.

Hence, controlled variable include uniform vinegar concentration and same type of weed.

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