Tell students they can think of the pieces of chalk as an ancient statue or monument. Give 2 saucers to groups of students. Have students place one piece of chalk onto each saucer. Have students predict what might happen to each piece of chalk. Have students pour approximately 1 tablespoon of water on the first piece of chalk, and 1 tablespoon of cola on the other piece.
Acid rain can be especially harmful to plants and animals.
One way to demonstrate this is by a relatively simple bean seedling experiment. Grow pairs of bean seedlings to approximately the same height. Obtain 2 spray bottles, putting distilled water in one bottle and vinegar in the other. Spray one seedling with the water, one with the vinegar. Have students observe, chart, and record the changes in the two seedlings over a period of several weeks.