Video Notes

Today in class we watched three videos.

Khan Academy:
1. Religion influences population growth because many religions promote large families. This increases the number of people who practice that faith. 
2. the 5 stages of demographic transition:
  1. High birth and death rate 
  2. More developed stage (high birth rates + young people) 
  3. More industrialized (birth rates decline + people are living longer lives) 
  4. More stabilized population (birth and death rates are low and longer life expectancy)
  5. Less young people than old 
3. Industrialized nations have better access to a good education and a good health care. 

Kim Smith:
1. Since the Agricultural Revolution (1750) the world population only grew 67,000 people each year and now we get that many people in 6-7 hours. 
2. In some industrialized counties we are experiencing exponential growth which means that there are higher fertility rates than mortality rates and it won't balance out until we reach 9-10 billion people in about 2050. 
3. The demographic transition theory tells the history of how mortality and fertility rates have dropped with industrialization. 

Why populations grow:
1. Japan has been experiencing a negative population growth since 2007. japan is also expected to lose 21% of its population by about 2050. 
2. One way population can be measured is by calculating the time it takes for the population to double in size. This is done by dividing 70 by the growth rate. 
3.  There are two main factors that influence population change:
  1. Natural increase Rate which subtracts the death rate from the birth rate. 
  2. Net migration Rate which subtracts the immigration rate from the immigration rate.

The video that I liked the best was the first one (Khan Academy). I liked that one because it showed the population pyramids of all the stages next to each other in a row so you could see the change in the population through the 5 stages. 

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