Jul 03, 2019 · Force is a quantitative description of an interaction that causes a change in an object's motion. An object may speed up, slow down, or change direction in response to a force. Put another way, force is any action that tends to maintain or alter the motion of a body or to distort it. Objects are pushed or pulled by forces acting on them. 128.interposition cue when one object overlaps another, the object that is partially obscured is perceived as being farther away 69.iris colored part of the eye that controls the size of the pupil and therefore the amount of light that enters the eye 106.just-noticeable difference - the difference between two stimuli that (under properly controlled Science, with its collection of data and conducting of experiments, is the paradigm of empirical knowledge. However, much of our more mundane knowledge comes from the senses, as we look, listen, smell, touch, and taste the various objects in our environments. But all knowledge requires some amount of reasoning.