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At what temperature does water boil at sea level?

  1. 90°F

  2. 100°F

  3. 212°F

  4. 250°F

The correct answer is: 212°F

Water boils at 212°F at sea level due to atmospheric pressure. At sea level, the standard atmospheric pressure allows water to transition from a liquid to a gaseous state at this temperature. The boiling point can vary at different altitudes; it decreases as pressure decreases, which is why the correct answer is 212°F, as it is the universally accepted boiling point of water at sea level conditions. Other temperatures listed, such as 90°F, 100°F, and 250°F, do not reflect the accurate boiling point of water. Specifically, 100°F is significantly lower than the boiling point, while 250°F exceeds it and indicates a pressure-cooking scenario where water can boil at higher temperatures due to increased pressure. Understanding this principle is essential for various applications in cooking, science, and engineering.