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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)
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
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**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!* Adjacent to the list of rules, there is a block diagram showing contour lines with various elevations such as +80, +70, +75, etc. This diagram demonstrates how contour lines form V-shapes when intersecting a river or stream. **Quick Check:** According to Figure 1 above, what is the highest possible elevation that you may encounter? What is the lowest possible elevation that you may encounter based on the same figure above? Concentric, nested contours indicate __________________________________________. 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? _______________________________________.
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!* Adjacent to the list of rules, there is a block diagram showing contour lines with various elevations such as +80, +70, +75, etc. This diagram demonstrates how contour lines form V-shapes when intersecting a river or stream. **Quick Check:** According to Figure 1 above, what is the highest possible elevation that you may encounter? What is the lowest possible elevation that you may encounter based on the same figure above? Concentric, nested contours indicate __________________________________________. 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? _______________________________________.
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