How much water can the air hold when the relative humidity of the air is 25%?
a. no more water
b. twice as much water
c. four times as much water
d. eight times as much water

The length of the path between two points is what

Does water only take one path through the water cycle? (15 points)

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