today in class we continued to learn about population and settlement. we learned about life expectancy. life expectancy means the average number of years believed by a group of people born in the same year. some examples are, the highest is in Monaco, 89.52 total- 85.63 men and 95.58 women. U.S. #42 79.68 total- 77.32 men and 81.97 women. lowest Chad 49.81 total- 48.64 men and 51.03 women. we also learned about crude birth rate, which means the number of births per 1,000 of the population. Also we learned about the crude death rate, which means the number of deaths per 1,000 of the population. we learned about rate of natural increase which is produced by subtracting the death rate from the birth rate. this gives us the annual natural growth rate in percentage form-for a country or region. the net migration rate is the difference between the number of persons entering and leaving a country during a year. an excess of persons entering the country is net immigration. this is written as a positive number . for example Canada has a 5.65 migration per 1,000 population. an excess of persons leaving the country is net emigration. this is written as a negative number. for example Mexico has a -1.68 migration per 1,000 population. I learned a lot of new things in class today.