Pass around sand and gravel. Have students put sand in one container and gravel in the other. Fill at least half full. Pass out worksheet. Review how to make observations and how to document observations by making notes and drawing illustrations.
Students draw and note what containers look like before adding water.
Encourage students to make predictions on what will happen when we pour water into each container. Have them write down predictions on handout. If possible, fill container with clay and repeat experiment. Students will see clay is not easily porous and not very permeable. Gravel does let water move and flow, so it is permeable.