Use this paragraph:
Water is sprayed on top of a sand pile. At the bottom of the pile, a pool forms that has sand floating in it. This pool is left to sit for three days. Upon returning it is noted that there is a layer of mud all along the bottom of the pool and the water is clear.
Which natural process is this modeling?
a. physical weathering
b. deposition
c. erosion
d. chemical weathering
