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==Structure==
Most bubbles appear to be clear, but they are auctally black when first popped. The bubble's 'skin' consists of a thin layer of water trapped between two layers of molecules, often [[soap]]. This surfactant possesses [[hydrophilic]] heads and [[hydrophobic]] tails. The hydrophilic heads are attracted to the thin water layer and keep the bubble intact. When the hydrophobic tails are agitated, the bubble pops. It may also burst when it hits pointy surfaces.
==Physics==
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