Each group needs:

• 1 cup vinegar
• 1 cup distilled water
• 2 medium-sized eggshell pieces
• 2 small green leaves
• 2 paperclips
• 2 small- or medium-sized glass jars
• masking tape and pen (for labeling containers)
• two 1.5-inch strips of wide-range (0-14 pH) litmus paper; since groups need to use the comparison chart included with the litmus container, obtain enough dispensers for each group to have one; litmus paper is available from chemistry supply companies (such as Fisher) and well-equipped hardware stores.
• Acid Rain Effects Worksheet, 1 per student (for recording data and answering questions)