Scenario B:

A group of scientists have made three model aquifers by using three different types of permeable rocks. The permeable rocks they used were: gravel, sand, and potting soil. They polluted each model aquifer with food coloring and measured the spread of pollution in all three models.

A. Write a question that could be the basis of their investigation:

 Does the type of permeable rock or the size of pore space affect the distance pollution that diffuses in model aquifer?

B.  What is the hypothesis for this investigation?

The pollution will diffuse or spread more in the gravel.

C.  Identify three factors that must be held constant during the experiment.

1.  The amount of food coloring used

2.  The amount of water used in each model aquifer

3.  The measurement tool used for each model aquifer

D. construct a data table below that other students could use to record and analyze the data collected during the new experiment related to pollution diffusion in permeable rocks. Be sure to label rows and columns appropriately and to include units if necessary.

Diffusion of Food Color:

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