Demographic Transition Videos and Notes

Today in class, we took notes on three videos. Below are the notes from the video. My favorite video is from Khan Academy because it gave us drawings of the population pyramids. The pyramids give us a clear image of its stability.


Khan Academy video

• Stabilization of the population in countries often occurs in industrialized countries because less developed countries, because less developed countries tend to rely on and follow other developed countries for advances. 
• The population pyramids in stage 1 have many births as well as many deaths make the overall population percentage stable.
• The population pyramids in stage 4 have low. death rates and low birth rates making the population stabilized.

video from Kim Smith, Ph.D.

• From the agriculture revolution to the industrial revolution, the world's population grew by about 67,000 people every year; now, the population is growing by about 67,000 people every 6-7 hours.
• Because of the plague, famine, and war, most countries were in stage 1 in early history because many people died pretty young after they gave birth to a child (or children) making the crude birth and death rate very high.
• In stage 3, the crude birth rate slowly decreases, and the population becomes more stabilized; women are starting to work and children are becoming liabilities instead of assets.

Why Populations Grow

• One way to measure the growth of the population is to calculate the doubling time- the length of time it takes for the population to double in size- by 70.
• Since the Industrial Revolution, the world's population has increased dramatically from 1800- present day.
• Factors that influenced the falling the death rates include improved health care, improved hygiene, boiling of drinking water, collection of garbage, improved food production, etc.