WHAT YOU WILL NEED: - At least four conversation heart candies
- A fresh bottle or can of colorless lemon-lime soda
- A tall, clear glass
WHAT YOU DO: Step 1: Fill the glass nearly to the top with the fresh soda. Step 2: Take the four conversation heart candies and drop them, one at a time, into the soda. Step 3: Watch the soda for a few seconds and observe the results...
WHAT'S GOING ON? The conversation hearts are denser than soda so they fall to the bottom of the glass. But after a few moments, some of the candies slowly rise up through the soda. The carbon dioxide bubbles in the soda stick to the candies, and when enough bubbles accumulate on the candy, they lift up through the soda. Once the candies rise on top of the soda, the carbon dioxide bubbles escape into the air and cause the candy to sink again. As the candy sinks, more bubbles stick to it and causing it to rise again and repeat the cycle. |