15Map ProjectionsMercator projection: map projection with horizontal parallels and vertical meridiansUsed for navigation-sailorsScale increases from equator to poles for parallels—spaces differs- higher latitude (above 60 degrees is double than at the equator. Needs to be cut off at 80 and enlarges features at the poles.Straight line features- Use maps of temperatures, winds, and pressuresStraight line on a Mercator projection not the shortest distance between two points
28Discussion Pair/Share Answer the following questions yourself. Pair up and discuss. Share with class.How have ecosystems in your city been affected by human activity? Good or bad.How have various kinds of pollution affected your life? List some sources of pollution in your city.What do you consider the most important pollution threat to the Earth.What are 3 things people could do to improve the quality of earth systems.