Hold the tube vertically. Begin timing when you pour the colored water into the top of the tube. When the water reaches the end of the tube record the ending time. Determine the rate of water movement. Record in data table.
Repeat steps a-e for each soil sample.
Analyzing Data Complete the conclusion questions. Explore expanding the concept. On the overhead transparency grid, make a bar graph of the particle size versus water flow rate. After analyzing the graph, write a one sentence description of the relationship between particle size and water flow rate. Present graph and description to class.