Aerodynamics Crossword Puzzle

QUESTIONS LIST: force : strength to push, drag : a car moving in a direction of motion, propulsion : moving forward, earth : the planet we live in, walking : movement of legs at a steady pace, aerodynamics : the way cars, planes, and other objects that air moves around it, lift : raised by the movement air, gravity : an invisible power around the universe, aeronautical : construction of planes, thrust : generated by the planes engine, flight : hot air balloon in sky, twirling : what ballerinas do, drop : a person letting go of an object