This passage describes four different experiments involving the use of a motion detector and the resulting velocity-time graphs. Ten different types of motion (fast, slow, movement towards and away from the detector, constant speed, changing speed, etc.) are contrasted in the experiments. Questions target a student's ability to interpret data, to compare and contrast the results of the various experiments, to use the results of the experiments to evaluate the validity of a conclusion, to identify the supporting evidence for a conclusion, and to reason towards appropriate conclusions when given the findings of an experiment.