topographic moodle

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Post on 30-Jun-2015

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  • 1. Topographic Maps

2. What is a Topographic Map? In contrast to most maps, a topographic map shows the shape of the Earths surface by using contour lines. 3. Contours are imaginary lines that join points of equal elevation above or below sea level. 4. Lets take a walk up a hill! 5. Were now at an elevation of 100 meters.100m 6. Lets keep going!100m 7. Now were at 200m.200m100m 8. Shall we march on?200m100m 9. Weve made it to 300m!300m200m100m 10. On to the peak!300m200m100m 11. Were on the peak, but whats our elevation?300m200m100m 12. Any ideas?Letsadd contour lines for every 50 meters and see if that helps. 300m200m100m 13. We know that we are above 350m, but less than 400m.350m 300m 250m 200m 150m 100m 50m 14. Lets head down the hill, its getting late!350m 300m 250m 200m 150m 100m 50m 15. Now whats our elevation? If you said somewhere between 200m and 250m you are right! 350m 300m 250m 200m 150m 100m 50m 16. Lets try this again!350m 300m 250m 200m 150m 100m 50m 17. Whats our elevation now? If you said 50m or just under, youre right! 350m 300m 250m 200m 150m 100m 50m 18. Lets 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, lets 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. Lets 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? More than 350 meters, less than 400 meters 26. Lets head down hill. 27. Know our elevation? 28. More than 100 meters, less than 150 meters 29. Lets see what you know. E C DB 1200mA 400 mF1000m 800m 600m 30. Grab a piece of paper and write your answers to the following questions.Ready? 31. 1. Could the elevation at the peak (B) be 1410 meters? E C DB 1200mA 400 mF1000m 800m 600m 32. 2. What is the elevation at (E)? E C DB 1200mA 400 mF1000m 800m 600m 33. 3.What is the elevation difference between (A) and (B)? E C DB 1200mA 400 mF1000m 800m 600m 34. 4. Could the elevation at (F) be 417 meters? E C DB 1200mA 400 mF1000m 800m 600m 35. 5. If you walked a straight line from (D) to (C) would you walk over a ridge or down a valley? E C DB 1200mA 400 mF1000m 800m 600m 36. 6.Just looking at the map, would it be easier to head down from the peak going East, or going North? NE C WDBE1200mF1000mA 400 m800m 600mS