Katie designed an experiment using a paint roller pan, sand, and water. the steps of the experiment are listed below.
put 3 inches of moist sand on a paint roller pan.
make a beach by scooping the sand towards the higher portion of the pan.
put some soil with very small plants growing on it on the sand.
pour water into the deeper end of the pan.
move the roller pan to create wave like motion in the water.
observe how the sand and plants are displaced by the waves.