PhysicsThermal expansionWAEC
Why does a pond freeze from the top downwards?
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Answer: A. Water below 4 °C is less dense and stays at the surface
Water is densest at 4 °C; colder water floats to the top and freezes there, while the 4 °C water stays below.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.