Study for test

Today in class we went over our notes to see what we needed for the test. Some things that I need to know are that there are 7.5 billion people on the planet right now. 90% of this population growth takes place in developing countries such as Africa, South and East Asia, and Latin America. We have to know the definition of Life Expectancy. Which is the average number of years to be lived by a group of people born in the same year. Women outlive men in life expectancy. Crude birth rate is the number of births per 1000 of the population. Crude death rate is the number of deaths per 1000 of the population. The rate of natural increase (RNI) is produced by subtracting the death rate from the birth rate. Net migration rate is the difference between the number persons entering a country and leaving a country during a year. An excess of persons entering the country is net immigration. Which is written as a positive number. An excess of persons leaving the country is net emigration. Which is written as a negative number. People migrate because of push and pull factors. Such as civil war.We have to name two countries that have push factors and two that have pull factors and explain them.

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