The air molecules are already there, so the airplane does not have to carry them around at least.

The object pushes the air molecules out of the way.

The principle is the same, but there are not nearly as many air molecules to push out of the way.

This is because the larger ball runs into more air molecules.

Some of the air molecules would have to disappear as they passed over the wing.

The number of air molecules in the bubble cannot change.

Higher temperature means that the air molecules do this more quickly.

It is not showing the motion of air molecules through space.

You would need to show the positions of multiple air molecules at different times.

We "see" the light that is scattered off of the air molecules into our eyes.