Question

an environmental engineer wants to examine the permeability of different soils to determine the best natural containment system to protect groundwater from pollutants. the engineer tests four different soil samples, places them into a wet column, and pours 50ml of water over each sample. the engineer records the total amount of water that moves through the column as well as the total amount of time for the water to fully percolate through the soil. the data from the study are shown below.

Answer 1

According to the information of the fragment the sample of material chosen as the potential container material is the independent variable of the research.

When conducting research we have the opportunity to use different types of research. One of them is that of the dependent and independent variables.

An independent variable represents a quantity that is modified in an experiment. On the other hand, dependent variables are those that represent a quantity whose value depends on how the independent variable is modified.

According to the above, in the situation presented, it can be inferred that the independent variable is the sample of material chosen as potential container material and the dependent variable is the results of the investigation that will have different filtration results for each type of soil.

Note: This question is incomplete because the question is missing. Here is the question:

• Which of the following best describes the independent variable in this research design?

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