Each student needs:

• splash-proof goggles (if conducting Alternative Procedure; see Troubleshooting Tips)
• Student Background Reading: Life of a Carbon Atom
• Dinosaur Breath Worksheet

Each group needs:

• 3-4 pieces of chalk (NOT dustless chalk)
• rolling pin and hard surface to crush chalk
• 1 small sandwich bag in which to crush chalk
• ¼ cup vinegar (either red or white)
• 2 small beakers, graduated cylinders, or small glass jars
• (optional) 1 small balloon
• (optional) 1 tsp. baking soda (see Troubleshooting Tips)

For the entire class to share:

• a few scales, to measure mass