Sort each of the following causes based on whether it is a long-term or short-term cause of climate change. Long-Term Cause Short-Term Cause
formation of continental seas increase in the amount of area covered by glaciers
eccentricity of Earth's orbit changes in ocean circulation
changes in the positions of Earth's continents
abrupt increase in greenhouse : gases
mountain-building processes

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