Pop quiz and more info about demographic models

Today in class, Mr. Schick just decided to give us a pop quiz! Yay... But actually... Anyways, after that pop quiz we were all silent, and we listened to whatever he was about to talk about. Today was all about demographic transition. Here are some of the notes that I took. First, demographic transition refers to the transition from high birth and death rates to lower birth and death rates. Next, as a country or region . develops from a preindustrial to an industrialized economic system. This theory was propose in 1929, by a man named Warren Thompson. He studied this, and information of population from 200 years ago. Then we went into farther detail. I learned hat the most developed countries have completed the full cycle of demographic transition. Also, that the model will track population changes that occur as a country begins to develop or industrialize. Next, it works on a scale from 1-5. 1 is the preindustrial phase, and 5 is developed or post industrialized. We then went into some more detail about core countries, and how they are at the fifth stage.