Everyone loves bubbles, but have you ever thought about how they form?

In this video, special guest, Kate the Chemist, shows you the science behind bubbles. With just a few simple materials, you’ll learn how to make a bright and colorful bubble snake using your breath, soap, water and a plastic water bottle.

Bubbles are pockets of soap and water that are filled with air – like your breath, which contains nitrogen, oxygen and carbon dioxide. When you combine soap and water together then blow air into the mixture, the soap forms a thin wall and traps the air – creating a bubble! The soapy film is composed of three layers: one layer of water molecules between two layers of soap molecules. Millions of these molecules will stick together to form the spherical shape of a bubble.