Some card will need to be taped in place. A thin layer of petroleum jelly should now be spread over one side of each card. Brainstorm possible places to hang these cards. As a whole class, rotate throughout the school yard, classroom and school building, placing cards a appropriate locations. Teams should record the location and date for each of their cards.
Older students can describe the condition of each location and predict the outcome for each.
This is a simple by clear demonstration of the effect of acid rain on plants. It can be a teacher demo or a team explorations. List on a class chart. Discuss what they have heard about acid rain. Tell them that acid rain is produced when air is polluted from cars, factories and fires.