Explaining Terminal Speed

As the downward speed of a falling object (1) , so does air resistance.  Thus, there comes a time when air resistance (2) the weight of the object.  At this speed the object no longer (3) , but instead it continues at the same (4) .  (This follows from F = ma, since if the net force is (5) , the acceleration must also be (6) .)  The final speed attained is called the object's (7) .