A student measures the heights of four bean plants grown in different types of soil. The amount of water given to each plant is kept the same and they are placed in the same location. What is the independent variable?

The independent variable here is the types of soil

Explanation:

An independent variable is the variable that is not affected by the outcome of other variables in a given experiment. This variable is the variable that is intentionally altered/changed (directly or indirectly) by the researcher in order/expected to produce a result for the experiment. Thus, the independent variable here is the types of soil. This is because the soil was intentionally changed/varied by the researcher and it's expected to determine the heights of the bean plants grown.

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