Mystery #3Tier 2water / cohesion
Why does water bead up into little round drops?
Spill water on a freshly waxed car or a leaf and it doesn't spread out flat; it pulls itself into neat, rounded beads that sit up like tiny domes. Why does water gather into balls instead of lying flat?
Your guess
What's your hunch about why water pulls itself into round beads instead of spreading out?
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