| A | B |
|---|
| population | total number of people |
| population distribution | where the population is around the Earth |
| demographers | scientists who study world's populations |
| population density | average number of people per square mile |
| birthrate | number of live births per year per 1,000 |
| death rate | number of deaths each year per 1,00 |
| life expectancy | average number of years people live |
| Green Revolution | new farming methods & fertilizers that increase our food supply |
| migration | moving from one place to another |
| immigrant | person who moves from country to another country |
| push pull theory | pushed from a home & pulled to a new place for better life |
| rural area | country & villages |
| urban area | cities |
| urbanization | moving from rural to urban areas |
| where 81% of all people live | Asia Europe North America |
| why people pick a place to live | water, good soil, nice climate |
| China | country with highest population |
| growth problems | lack of food, space, jobs |
