1. Explain the population explosion in sub-Saharan Africa. Why is most of the growth projected to be in this region and not in India or China? Be sure to use vocabulary terms (natural increase rate, fertility rate, doubling time) in your response.

2. Why do the two groups, the United Nations and the IIASA, differ on their projections for the growth of the world’s population, and how much uncertainty exists?

Which statement best explains the relationship between an area's geography and the temperature of its surface water? areas at low altitudes have the warmest water because they receive the most direct sunlight. areas at low altitudes have the warmest water because they have the least change in temperature throughout the year. areas at high latitudes have the warmest water because their days are the longest. areas at high latitudes have the warmest water because they have the longest seasons.