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科学素养与生活应用·英语30篇(3)

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Why Ice Floats on Water

Why Ice Floats on Water

为什么冰会浮在水面上

  1. Water expands when it freezes into solid ice crystals.
  2. This makes ice less dense than liquid water below it.
  3. Less dense materials naturally rise above denser ones.
  4. So ice floats instead of sinking to the bottom of lakes.
  5. Floating ice insulates water underneath, helping fish survive winter.
  6. Scientists call this property 'anomalous expansion' of water.
  7. It’s rare—most substances become denser when frozen solid.
  8. This simple fact supports life in cold climates worldwide.
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