2. How an Airplane. # Air is hard. Does that sound wrong? Well, it's not. Air is hard to an airplane. The airplane flies on air. Its wings rest on air. Air holds the plane up that are shaped in Here's how it works. The plane has win a special way. When the plane moves, air pushes hard underneath the wings. It pushes underneath than on harder top of the wings. The wing shape makes this happen. The air lifts the plane off the ground. The plane floats air like a boat floats on water. How does on it turn in the air? How does it or down? Parts of the go up wings and tal can move. The pilot makes them move. When the move, the air presses on them even harder than parts before. This makes the plane turn, rise up, or go down. Air looks like nothing. But we know this isn't so. We can feel when we blow on our hands. We feel it hit our hands. air Air pushes at us. Air pushes on wings. Airplanes fly on nothing-but hard air.