Contour lines follow some basic rules. If you understand contour lines, you should be able to explain why each of these rules is true: 1. The closer spaced contour lines are, the steeper the ground surface is. 2. Contour lines never cross 3. Contour lines never branch 4. Contour lines never change elevation 6. 5. Contour lines never skip (e.g., you can never have the sequence of lines 10, 20, 40 without having 10, 20, 30, 40) Contour lines always have an up side and a down side (all elevations on one side of the line are higher than the line, all elevations on the other side lower). The up and down side never change along the length of the contour line. When contour lines cross rivers, streams, etc... they form V's. 7. Example: Note the Rule of V's! Pubb Like ** Concentric, nested contours indicate Contournal-10 mots Quick Check: According to Figure 1 above, what is the highest possible elevation that you may encounter? 185 What is the lowest possible elevation that you may encounter based on the same figure above? When contour lines are close together, this means When contour lines are spread out further, this means_ What is the contour interval of 25ft, 30ft, 35ft lines?
Contour lines follow some basic rules. If you understand contour lines, you should be able to explain why each of these rules is true: 1. The closer spaced contour lines are, the steeper the ground surface is. 2. Contour lines never cross 3. Contour lines never branch 4. Contour lines never change elevation 6. 5. Contour lines never skip (e.g., you can never have the sequence of lines 10, 20, 40 without having 10, 20, 30, 40) Contour lines always have an up side and a down side (all elevations on one side of the line are higher than the line, all elevations on the other side lower). The up and down side never change along the length of the contour line. When contour lines cross rivers, streams, etc... they form V's. 7. Example: Note the Rule of V's! Pubb Like ** Concentric, nested contours indicate Contournal-10 mots Quick Check: According to Figure 1 above, what is the highest possible elevation that you may encounter? 185 What is the lowest possible elevation that you may encounter based on the same figure above? When contour lines are close together, this means When contour lines are spread out further, this means_ What is the contour interval of 25ft, 30ft, 35ft lines?
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Transcribed Image Text:Figure 1: Example of contour lines on a 3-dimensional block diagram.
Contour lines follow some basic rules. If you understand contour lines, you should be able to explain why each of these
rules is true:
1. The closer spaced contour lines are, the steeper the ground surface is.
2. Contour lines never cross
3.
Contour lines never branch
4.
Contour lines never change elevation
5.
Contour lines never skip (e.g., you can never have the sequence of lines 10, 20, 40 without having 10, 20, 30, 40)
6. Contour lines always have an up side and a down side (all elevations on one side of the line are higher than the line,
all elevations on the other side lower). The up and down side never change along the length of the contour line.
7. When contour lines cross rivers, streams, etc... they form V's.
Example:
Note the Rule of V's!
53
.64
67
-65
.60
Concentric, nested contours indicate_
Pebble Lake
100-
*74
DB
12
60
<- 68
75
What is the contour interval of 25ft, 30ft, 35ft lines?
ya
When contour lines are close together, this means
When contour lines are spread out further, this means
B
1.6km
58
70
-60
-57
.61
68
-70
52
53
57
55
68
75
-53
60
Contour interval - 10 meters
50-
Quick Check:
According to Figure 1 above, what is the highest possible elevation that you may encounter?
56.
What is the lowest possible elevation that you may encounter based on the same figure above?
60-
63
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