Calculate the gradient between X and Z and state your answer in the space below as a ratio or as decimal fraction.

What causes the cyclical changes in the appearance of the moon?

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

When you start from a given set of rules and conditions and determine what must be true you are using blank reasoning