One student did an experiment with sand, gravel, and water. the steps of the experiment are shown below: -put layers of sand and gravel in a beaker. -pour water slowly into the beaker. -observe the water fill the spaces between the particles of sand and gravel. -continue to pour water into the beaker until the water rises above the layer of sand and gravel. what does the student's experiment most likely demonstrate? a. the movement of recharge through the layers under the earth b. the movement of groundwater in a well filled with sand and gravel c. the formation of geysers when water rises from the earth's surface d. the formation of sinkholes when water seeps through sand and gravel