air - the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen., aircraft - an airplane, helicopter, or other machine capable of flight., lift - raise to a higher position or level., thrust - push (something or someone) suddenly or violently in the specified direction., drag - the force that acts opposite to the direction of motion, is caused by friction and differences in air pressure., Bernoulli’s Principle - explains how an aircraft used their wings to achieve lift. They are shaped so that air flows faster over the top of the wing and slower underneath. Fast moving air equals low air pressure while slow moving air equals high air pressure., aerodynamic - of or having a shape which reduces the drag from air moving past., weight - the force of gravity pulling aircrafts towards the Earth., gravity - the force of attraction that pulls objects towards one another.,

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