What is the flight level (FL) that corresponds to 10,000 feet?

The correct answer is FL100, which corresponds to an altitude of 10,000 feet. Flight levels are a way of indicating altitude in terms of hundreds of feet, with the number representing the altitude in thousands above sea level. Specifically, FL100 means 10,000 feet.

To clarify further, when altitude is expressed in flight levels, it is typically rounded to the nearest hundred feet and followed by "FL." Therefore, FL100 means that the aircraft is flying at an altitude of 10,000 feet above mean sea level. This system helps in maintaining a standardized altitude format for air traffic control, making it easier for pilots and air traffic controllers to communicate.

Understanding the flight level system is crucial for navigation and ensuring safety in the airspace.