US State Centroid Locator Streak
DirectionsDouble-click on the map as close as possible to each US state’s geographic center (centroid) that shows up on the right. The closer you click, the more points you get (max 100). You must get at least 85 points to move on to the next state, otherwise the quiz ends. Object is most states completed, not points.
Geographic centers are based on the modern definition used by the USGS, which is “the center of gravity of the surface, or that point on which the surface of the area would balance if it were a plane of uniform thickness…derived by minimizing the sum of squared great circle distances from all points of land in a state (including islands, but not coastal waters.”
Quiz Takers 