G3 PHySICAL SySTEMS Describe the physical processes that shape the Earth’s surface which, along with plants and animals, are the basis for both sustaining and modifying ecosystems. Identify and analyze the patterns and characteristics of the major ecosystems on Earth. G3.1Physical Processes Describe the physical processes that shape the patterns of the Earth’s surface. 6 – G3.1.1 Construct and analyze climate graphs for two locations at different latitudes and elevations in the region to answer geographic questions and make predictions based on patterns. (e.g., compare and contrast Buenos Aires and La Paz; Mexico City and Guatemala City; Edmonton and Toronto). G3.2 Ecosystems Describe the characteristics and spatial distribution of ecosystems on the Earth’s surface. 6 – G3.2.1 Explain how and why ecosystems differ as a consequence of differences in latitude, elevation, and human activities (e.g., South America’s location relative to the equator, effects of elevations on temperature and growing season, proximity to bodies of water and the effects on temperature and rainfall, effects of annual flooding on vegetation along river flood plains such as the Amazon). 6 – G3.2.2 Identify ecosystems and explain why some are more attractive for humans to use than are others (e.g., mid-latitude forest in North America, high latitude of Peru, tropical forests in Honduras, fish or marine vegetation in coastal zones).