Title: Why Do Planes Fly So High?
Headings: 
“Why Do Planes Fly So High?”
Content: • Altitudes are defined in relation to number of feet above sea level. Pilots need to aware of the terrain over which they are flying. For example, twenty thousand feet may be suitable for southern Florida but it may not be the same if the aircraft was flying over mountains. • Cruising altitude would also depend on weather. Pilots receive weather reports and request alternate cruising altitude from air traffic control to avoid air turbulence. • The length of the flight also plays an important role. The cruising altitudes for short flights are usually less as compared to the cruising altitude for longer flights. • Flying too close to the clouds may make it hard for the pilot to see and cross winds may lead to air turbulence. • Flying low means more bug and insects on the wind shield which again can make it hard for the pilot to see in front and reduce visibility. • There is less friction at higher altitudes, less friction and higher air speed causes engines to burn less fuel therefore it improve fuel efficiency allowing the airplane to travel further.