Possible school experiment to show importance of wetlands/riparian zones! This shows the importance of plants in our soil. Plants like trees and grasses help purify ground water. Without them the ground water gets polluted and harder to clean and drink.
Earth Day water pollution experiment @ Getting Messy with Ms. Collect litter from playground, put in a covered jar of water for a few days, and observe what happens. Simple experiment but one your students will definitely remember!
Filtering dirty water- but a coffee filter or a paper towel in a cone line shape and stick in water bottle. Pour dirty water through the paper and watch the clean water pour into the bottle and the dirty stay in the paper.