correct gets brainliest  joe sowed seeds of a plant in two different types of soil in separate pots. she added the same amount of fertilizer to the pots. she then placed the pots in the sun and recorded their growth after four days. what is the independent variable in the study? duration of growth amount of fertilizer growth of seeds type of soil

Type of soil

Explanation:

An independent variable is the one which can be changed or manipulated in an experimental setup. The affect of such changes can be observed on the changes occurring in the dependent variable. A dependent variable is the one which cannot be changed or manipulated manually instead the changes occurring in the dependent variable is because of the independent variables.

In the given situation, the type of soil is an independent variable as it can be changed in an experimental setup, the effect of the soil chosen is observed on the growth of the seeds of a plants which is a dependent variable of the experiment.