Tropical rain forest In the highlands of Mexico and the Andes region of South America: (a) farmers grow
the same crops at different elevations (b) temperatures are similar on the upper and
lower slopes (c) the length of the growing season changes with the elevation

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

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."

Countries in this region are trying to achieve development. a. attainable c. sustainable b. suspendable d. intangible