Absent

I'm still out due to sickness, and cannot write a blog post.

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Population Pyramids

Today we discussed population pyramids, a way to measure population while taking aspects like age and gender into consideration. In a population pyramid, men are on the left, women are on the right, the youngest are on the bottom and the oldest are on the top. The ages are separated into 5-year increments and grouped into pre-reproductive (0-14), reproductive (15-44) and post-reproductive (45-100+). We can predict future population trends by looking at the base of the pyramid. A large base points toward population increase, and a small base points toward a population decrease. Pre-industrialized countries tend to have larger populations because of the lack of availability of birth control, while developed countries tend to have steady population numbers or population decrease as people put off having children for later years or simply never have children. Pre-industrialized countries also usually don't have highways, great schools, or airports. This is because most of the state...
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Population Rates

Today in class, we discussed crude birth rate, crude death rate, immigration and emigration. Crude birth rate is the number of births per 1000 population, and crude death rate is the number of deaths per 1000 population. When you subtract the crude death rate from the crude birth rate, you get the rate of natural increase, or RNI, which is the annual natural growth rate of a nation in percentage form. Then we got into net migration rate, which is the difference between the number of people leaving a countermand the number of people coming in to that same country during a year. An excess of people coming into a nation is net immigration, written as a positive number. An excess of people leaving a nation is net emigration, written as a negative number. People have push forces and pull forces for immigrating and emigrating. Push forces include civil war, environmental degradation, unemployment/ underemployment, and religious of ethnic persecution. Pull forces include better economic o...
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