The ReMax Realty came to visit us today to teach us how hot air rises.I learned that hot air rises and cold air sinks.  I also learned that the wind controls the air balloon not the pilot.  To make the air balloon sink you pull a rope and the top will come off.  The temperture can go up to 270* if it goes over the balloon might burn and have a hole in it.  The hot air balloon was the first aircfaft ever built in the 1700’s.