Exploring Our Global Grid System
Guiding Questions
for Introducing and Exploring Latitude and Longitude
 Questions for Locating a Spot on a Flat Rectangle or Square: Mark a spot on a piece of paper. How would you describe where the spot is located? What words would you use to help someone pinpoint where the spot is located? (up, down, right, left, above, below, north, south, east, west, top, bottom, hemisphere, etc.) How would you draw a grid system on the page to help you describe the spot's location? What measurement tools would you use to find the middle of the page? What measurement tools would you use to draw horizontal and vertical lines that were evenly spaced on the page? How would you measure and draw lines that were equal distances apart? How would you label each horizontal and vertical line to help you describe where the spot is on the page? Which line is your "equator" dividing the page into two equal parts? (Helpful Hint: Draw this line with a different color marker.) How far apart are the lines of your grid? How many horizontal and vertical lines did you draw on the page? How would you describe or label each point where the horizontal and vertical lines intersect? How did this activity help you learn more about our global grid system? latitude and longitude lines? How can you use north, south, east, and west to describe where the spot is located?
 Questions for Locating a Spot on a Spherical Object Mark a spot on a sphere (orange, grapefruit, styrofoam ball, etc). What words would you use to describe where the spot is located? How would a grid system work on a spherical object? If you were going to draw a grid system on an orange, where would you start? Where is the top of the sphere? Where is the bottom? What measurement tools could you use to find the middle of the orange? How would you measure to find out where to draw a line that would divide the orange into two equal parts? After drawing a line around the middle of the orange, how would you describe the two parts? Which of these words would you use to describe the two parts of the orange: top, bottom, upper, lower, above, below, north of, south of, hemispheres? How will you decide where to draw horizontal lines so that they are equal distances apart? After drawing horizontal and vertical grid lines on the orange, what did you notice? How are the latitude lines different from the longitude lines? Which horizontal line divides the sphere into two equal parts? How would you describe each part? Which vertical line divides the sphere into two equal parts? How would you describe each part? How can looking at the latitude and longitude lines on a globe help you draw a grid system on an orange? What challenges did you encounter when you were drawing horizontal and vertical grid lines on the sphere?