For Part 1 - Creating a Model Lung, each group needs:

• two-liter plastic bottle with cap, with the bottom cut off and holes drilled into the cap
• 2 plastic drinking straws or 6 inches (15 cm) of tubing (clear flexible tubing works well, 0.5-1.0 cm in diameter; available at hardware or pet supply stores)\
• 3 balloons (1 large enough to stretch over bottom of two-liter bottle; 2 smaller ones, representing lungs)
• 2 rubber bands
• 2-inch (5-cm) cube of soft modeling clay
• Respiratory System Worksheet, one per person
• Face Mask Filter Design Worksheet

For Part 1 - Creating a Model Lung, the teacher needs:

• scissors, to cut plastic bottle
• drill, to make two holes in bottle cap to receive straws or tubing

For Part 2 – Creating a Face Mask Pollution Filter, each group needs:

• 1 model lung from first part of activity
• A variety of materials from which students may select to make a face mask filter, such as white paper, cotton balls, coffee filters, cloth, felt, gauze, foam, cotton batting, string, rubber bands, tape, etc.
• Scissors

For Part 2 - Creating a Face Mask Pollution Filter, for the entire class to share:

• spray bottle of water
• timing device
• Dust in the Respiratory System Visual Aid, overhead transparency or handout