Question

    Lakes freeze in cold countries in winter, leaving the

    water underneath at –
    A 0°C Correct Answer Incorrect Answer
    B 0°F Correct Answer Incorrect Answer
    C 4°C Correct Answer Incorrect Answer
    D 4°F Correct Answer Incorrect Answer

    Solution

    Lake ice cover is seasonal and occurs where average daily temperature is below the freezing point. Once formed the lake ice thickens over the course of the winter as the temperature gets colder. The lakes thermal structure prepares for ice with 0 (zero) degrees Celsius water at the surface and denser 4 degrees Celsius at the bottom.

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