Question

hypothesis: roses watered with liquid vitamin B grow faster than roses fed with water alone?

dependent variable :

independent variable :

name several control variables :

what would be a positive control: why?

what would be a negative control: why?

Answer 1

- Dependent variable: Plant growth rate

Remember that the dependent variable is the one that is going to vary depending on the value sof the independent variable, and it is actually the trait that we are going to measure.

- Independent variable: Concentration of liquid vitamin B provided

Remember that the independent variable is the one that you control, and the variable that we stated might affect the dependent variable

- Name several control variables: Any variable that my affect our dependent variable that is not of our interest like: Light availability, quality of light, access to fertilizers, space in the pot for roots, etc.

- What would be a positive control: why? A positive control would be a treatment that would actually positively affect plant growth, in this case it could be exposing permanently a group of plants to light of the best quality

- What would be a negative control: why? It would be a treatment in which the plants won't recieve any liquid vitamin B. Because this will give the negative result if we consider vitamin is not affecting plant growth