2. As you look through the following slides please: Write one sentence for EACH slide that covers the Main Idea and Supporting details for that slide

3. Topographic map: a map showing the surface features of an area Gives information about Elevation Relief Slope

4. To decide where to build new stores, houses, schools or factories To plan bicycle trips or hikes

5. The USGS (U.S. Geological Survey) The USGS has made about 57,000 that cover all of the United States except parts of Alaska!

6. Mapmakers use symbols to represent features on a map

7. Contour Lines: Used to represent elevation, relief, and slope on topographic maps All points with the same elevation are connected with a contour line

8. The closer the lines are, the steeper the slope!

9. Contour Interval- The difference in elevation between two contour lines that are next to one another.

10. Global Positioning System: a method of finding latitude, longitude, and elevation of points on Earth’s surface using satellites

12. Click on the link that follows to see topographic maps in action! ://www.youtube.com/watch?v=xgrOaWKyv8w