Students will discover the effect of particle size and water content on the ability of a soil to hold together.
All dry soils form same-shaped mounds.
I A Pour 1 spoonful of bb's through a stationary funnel. B Repeat in a different location forming a mound for each soil . C Position a 3x5 index card and insert quickly to dissect the mound. D Use a different colored pencil to trace the outline of each mound. Write your observations and summarize the results.