Hello, I have a question that my 11 year old son asked me and I have no idea how to answer it. The question was when a pilot is flying a jumbo jet at 500 to 700 miles an hour does the pilot keep the plane level with the horizon when we live on a globe, does the pilot have to keep correcting the height to follow the roundness of the earth? This may seem like a strange question but the more I thought about it the more I was confused could someone tell me how to answer this please I would be very grateful.