Each group needs:

• cold water
• isopropyl (rubbing) alcohol
• food coloring (any color)
• clear, narrow-necked plastic or glass bottle (for example, an 11 oz water bottle)
• rubber stopper with a hole (often part of classroom science kits), to create an airtight seal for the thermometer (alternative: modeling clay, but more difficult to get a good seal)
• long, clear straw (such as balloon sticks from a party supply store)
• Temperature Conversion Worksheet

To share with the entire class:

• isopropyl (rubbing) alcohol or mercury thermometer for calibrating
• black Sharpie® or waterproof marker
• (optional) large bowls or containers of water in different temperatures (to act as water baths, with varying temperatures from ice cold to very warm)