| A | B |
|---|
| death rate | The number of deaths compared to the total number of individuals in a population at a given time. |
| birthrate | The number of babies born compared to the total number of individuals in a population at a given time. |
| doubling time | The number of years it takes a population to double in size based on its current growth rate. |
| population distribution | The geographic pattern of where people llive on Earth. |
| population density | The average number of people living within a square mile or square kilometer. |
| urban | Areas that are densely populated. Ex: cities |
| rural | Areas that are sparsely populated. Ex: farmlands |
| emigrate | to leave one's home to live in another place (Think of the word "exit" that starts with an "e".) |
| immigrate | to enter and live in a new country (Think of the word "in" that starts with an "i".) |
| refugee | People who flee a country because of violence, war, or persecution. |
| urbanization | when cities grow larger and spread into surrounding areas |
| megalopolis | A huge city or cluster of cities with an extremely large population. |
