2ND avfun

is composed of several layers, each with distinct characteristics that

influence flight operations.

(0 - 10 km)

This is the layer closest to the Earth’s surface, where most weather

phenomena, such as clouds, rain, thunderstorms, and turbulence, occur.

The troposphere contains about __% of the atmosphere's mass and is characterized by

a decrease in temperature with altitude.

Weather phenomena like turbulence, thunderstorms, and icing are most

common here, significantly affecting flight planning, safety, and aircraft

performance.

▪ Aircraft typically fly at altitudes within or near the upper part of the

____________ for commercial flights, where the air is still dense enough for

optimal lift and engine performance.

(10 - 50 km)

is where the ozone layer is located, which

absorbs and scatters ultraviolet solar radiation. Temperatures rise with altitude due

to the absorption of solar radiation by the ozone layer.

Aircraft generally do not fly in the lower part of the _________, but some

high-altitude flights, such as those conducted by the Concorde or military

aircraft, may reach into this layer.

▪ The stable air in the _________ leads to less turbulence compared to the

troposphere, which is why it is a desirable altitude for supersonic flight or

high-altitude scientific research flights.

(50 - 85 km)

is where most meteorites burn up upon entry into

the atmosphere. Temperatures decrease with altitude in this layer.

Aircraft do not operate in the ______ because it is too high for

conventional flight, and the air density is too low to generate lift. This layer is

primarily relevant for space-related operations and atmospheric studies.