During large group time discuss with the students their predictions and observations. Write the word pollution on the visual board. Discuss the meaning of pollution. Encourage the students to give you their views on the subject. Allow the water table to remain undisturbed overnight and encourage the students to observe how it has changed.
Soil pollutes water by making it unclean.
The water clears as it stands. Water is safe to drink when it is clean and not polluted. Please stress to the students that while water may look clean, it may contain harmful, invisible germs which could cause illness. Polluted water is never safe to drink. Go on a field trip to a pond and observe the water plants and wildlife that lives in the pond.