During the Fall 2011 the 7 billionth human on earth was born. The counter above gives updated approximations of the current world population. When will we hit 8 billion people? Students look at the number 7 billion, try to grasp its enormity with some comparisons, check out population, calculate some population density, work again with percents and have some fun thinking about our globe and where we live.
Below, for members, we have a teaching guide with solutions and suggestions for extentions.