A student sets up a model of an aquifer, as shown below. Topmost loyer and
represents tapo
Pool of open water
represents take
Aquifer
Bottom layer
fcourse pravel and water
How could the student model how pollution from waste materials can affect groundwater?
A. Place a sponge soaked with vegetable oil into a pool of water and observe how drops of oil float on top
of the water.
B. Place bits of white paper onto sand and observe how pouring a lot of water on it washes the paper
downhill to the pool of water.
C. Place bits of dyed paper onto the sand and observe how sprinkling water on it eventually dyes the water
within the gravel layer.
D. Place the model outside on a sunny day and observe how long it takes all of the water to evaporate.