Passing through some of the most sparsely populated territory in the country, I-90 connects Seattle, Chicago, Cleveland, Buffalo, and Boston. This interactive data visualization depicts the population density of selected cities along the I-90 route.  Selected cities along the route are labeled, for reference, with cities of 250,000 or more shown in bold and with filled circles.  The graph is based on average population density within 5 miles of the I-90 route, in 2-mile increments, using 2010 block group centroids.

Calculating with Scientific Notation - Comparing Populations

Students will use population data from the U.S. Census Bureau to read and write numbers in scientific notation and to make comparisons of that data for states and decades.