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- 1. Topographic Maps
- 2. What is a Topographic Map? <ul><li> In contrast to most maps, a topographic map shows the shape of the Earth’s surface by using contour lines. </li></ul>
- 3. <ul><li>Contours are imaginary lines that join points of equal elevation above or below sea level. </li></ul>
- 4. Let’s take a walk up a hill!
- 5. We’re now at an elevation of 100 meters. 100m
- 6. Let’s keep going! 100m
- 7. Now we’re at 200m. 100m 200m
- 8. Shall we march on? 100m 200m
- 9. We’ve made it to 300m! 100m 200m 300m
- 10. On to the peak! 100m 200m 300m
- 11. We’re on the peak, but what’s our elevation? 100m 200m 300m
- 12. Any ideas? 100m 200m 300m Let’s add contour lines for every 50 meters and see if that helps.
- 13. 100m 200m 300m We know that we are above 350m, but less than 400m. 50m 150m 250m 350m
- 14. 100m 200m 300m Let’s head down the hill, it’s getting late! 50m 150m 250m 350m
- 15. 100m 200m 300m Now what’s our elevation? 50m 150m 250m 350m If you said somewhere between 200m and 250m you are right!
- 16. 100m 200m 300m Let’s try this again! 50m 150m 250m 350m
- 17. 100m 200m 300m What’s our elevation now? 50m 150m 250m 350m If you said 50m or just under, you’re right!
- 18. Let’s now look at the same hill, but the way we might see it from an airplane!
- 19. Each color change represents a 50 meter increase.
- 20. Now, let’s try the same hike! Our elevation is 0 meters.
- 21. Now what is our elevation?
- 22. If you said more than 150 meters, but less than 200 meters your right!
- 23. Let’s go a little higher.
- 24. Think you know our elevation now? More than 300meters But less than 350meters
- 25. If we were standing on the peak, what would be our elevation? <ul><li>More than 350 meters, less than 400 meters </li></ul>
- 26. Let’s head down hill.
- 27. Know our elevation?
- 28. More than 100 meters, less than 150 meters
- 29. I think you got it!
- 30. Let’s see what you know. 400m 800m 1000m 1200m A B C D E F 600m
- 31. <ul><li>Grab a piece of paper and write your answers to the following questions. </li></ul><ul><li>Ready? </li></ul>Quiz Time
- 32. 1. Could the elevation at the peak (B) be 1410 meters? 400m 800m 1000m 1200m A B C D E F 600m
- 33. 2. What is the elevation at (E)? 400m 800m 1000m 1200m A B C D E F 600m
- 34. 3.What is the elevation difference between (A) and (B)? 400m 800m 1000m 1200m A B C D E F 600m
- 35. 4. Could the elevation at (F) be 417 meters? 400m 800m 1000m 1200m A B C D E F 600m
- 36. 5. If you walked a straight line from (D) to (C) would you walk over a ridge or down a valley? 400m 800m 1000m 1200m A B C D E F 600m
- 37. 6.Just looking at the map, would it be easier to head down from the peak going East, or going North? 400m 800m 1000m 1200m A B C D E F 600m E N S W
- 38. <ul><li>1. No :The elevation must be under 1400 meters, but over 1300 meters. </li></ul><ul><li>2. about 400 meters </li></ul>Answers!
- 39. <ul><li>3. (A) is probably close to the 750 meter line, (B) is above 1300 meters. The difference between the two would probably be 650 to 700 meters. </li></ul>Answers!
- 40. <ul><li>4. No : It must be more than 700 meters and less than 800 meters. </li></ul><ul><li>5. Down a valley : If the contour lines point up the slope it’s a valley, if they point down the slope it’s a ridge. </li></ul>Answers!
- 41. <ul><li>6. East : When contour lines are close together that means there is a steep slope, the further apart the lines, the more gentile the slope and therefore an easier walk! Go east! </li></ul>Answers!

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