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Why Does Ice Float on Water?

Why Does Ice Float on Water?

为什么冰能浮在水面上?

  1. Water is unusual because it expands when it freezes into ice.
  2. Ice has more space between its molecules than liquid water.
  3. That makes ice less dense and lighter than cold water.
  4. So ice floats instead of sinking like most solids do.
  5. Floating ice keeps lakes and rivers from freezing solid in winter.
  6. This helps fish and plants survive under the surface.
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