Why ice floats: the unique physics that sustains aquatic life
In short: Most substances become denser when they freeze, but water behaves differently. This video explores the biological and physical significance of why ice is less dense than liquid water.
The video explains a fundamental property of water: it is less dense as a solid (ice) than in its liquid state. This physical anomaly is critical for life on Earth, as it prevents lakes and oceans from freezing solid from the bottom up.
By staying liquid beneath the surface, these bodies of water provide a sanctuary for aquatic organisms to survive during harsh winters. The content serves as an introduction to how such intricate systems make life possible.
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Sources
- Summary by Intellect · source: Liquid water denser than solid water (ice) | Biology | Khan Academy
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