There is a way to broaden that line. Then, select Symbol and choose the filled in box. The result is also displayed in the background of Figure 19 . In this investigation it is essential that groups share information. Charts are the best way to do this sharing.
Students can also send email to each other describing their results.
Describe each town's precipitation amounts as well as temperature variations throughout the year for the entire period. Students working in pairs can prepare Power Point presentations describing where their towns are. See Figure 20 for the article that now displays a symbol for global warming. Global temperature data are provided as departures from normal in degrees Celsius. Section the spreadsheet to more easily handle the massive amounts of data using the double line bars at the top and on the side.