When particles of sediment and gravel are sorted by size, the porosity of the soil is at its greatest. Water can easily flow through the uniform spaces created by the layering of distinct sizes of particles, increasing the permeability of the soil and allowing more water to penetrate deeper layers.
Students examined the effects of sorted and unsorted particle layers on porosity and permeability.
Student randomly dropped various sized beads (ranging from 10 mm diameter to 50 mm diameter) into a glass cylinder. The top of the cylinder was labeled A, and the resting point near the bottom of the cylinder was labeled as B for each bead. They then recorded how long it took for water to reach the bottom of the cylinder in an effort to measure porosity and permeability.
The students repeated the procedure detailed in Activity 1 except that the beads were placed in the cylinder in order of increasing diameter.
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During Activity 1, as the aluminum particles dropped from A to B of the glass cylinder, the potential energyCorrectIncorrect
According the the information presented, which diagram (below) most likely represents the glass cylinder as described in Activity 2?CorrectIncorrect
According to the passage, water would move most quickly through which of the following types of soil?CorrectIncorrect
Suppose the students had performed a third activity that followed the procedures of Activity 1 except that the beads were placed into the cylinder in order of decreasing diameters. How would the time measured for water to move through the cylinder compare to the times measured for Activities 1 and 2?CorrectIncorrect
Suppose the students had placed the 10 mm, 30 mm and 50 mm particles into a shallow trough of moving water they had constructed (to simulate a stream). Which cross section (below) shows how the three sizes of particles are sorted when the stream is at its slowest.CorrectIncorrect