15. on a surface weather map, a stationary front is drawn in purple. 16. the top part of a thunderstorm usually has a negative charge. 17. on average, cities tend to be warmer and more polluted than rural areas. 18. when the base of an inversion lowers, pollutants are able to be dispersed throughout a greater volume of air. 19. the terms typhoon and cyclone refer to the initial weaker stages in development of a hurricane. 20. the region of strong winds of a jet stream is called a jet maximum or jet streak.

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

Reason i shouldnt turn back if i'm lost in the wilderness need fast

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population