everyday science MCQ #1141

A lake starts freezing because of the cold atmosphere. It will first freeze:

everyday science MCQ #1141

  1. Question 1

    Q1. A lake starts freezing because of the cold atmosphere. It will first freeze:

    • A) At the bottom
    • B) In the middle part
    • C) At the top surface
    • D) Uniformly throughout the water body

    Answer: At the top surface

    Explanation: Water has maximum density at 4°C; as surface water cools below this, it becomes less dense and stays at the top, so ice forms first at the surface of a lake.