Log in to TheConstructor to ask questions, answer peoples questions, write articles & connect with other people. The map has a contour interval of forty feet, contour (X,Y,Z) specifies the x and y coordinates for the values . (2 pts) What is the relief on this map? Sometimes vertical exaggeration is desiredbut, in some cases, you may not want it. To avoid having your profile distorted so that it accurately conveys what the surface of the Earth really looks like in profile, you will want both the vertical and horizontal scales to match. 9.4) to estimate the elevation of this point as accurately as possible. What is the latitude for this monument? Axons from which neuron in the retina make up the optic nerve? The contour interval is 20 meters ( Figure 10-2 ), thus each one of the intermediate contour lines crossed to get to point (a) adds 20 meters to the 500-meter index contour line. The given point, 537', therefore, must lie between the 520' and 540' contours (contours aand b). Absolutley amazing app and would definitely recommend. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Assume value is an integer variable. Contour Interval on Topographic Map. The lowest contour line is at 200m. (1 pt) Contour intervals located on this map are few and far between. Because the stream flows south, contour a, which lies downstream of contour b, must be the lower of the two. Possible contours include 500', 520', 540', 560', 580', 600', 620', etc. the result from the nearest marked contour line. than 6760 feet, but less than 6800 feet. What is the latitude on the northern edge of this rectangle? 1 ft = 24,000 ft, and 24,000 ft x (\(\frac{1\;km}{3280\;ft}\)) = 7.32 km. What is the tolerance for compression test results of concrete, according to the standards? Use the appropriate conversion factor to convert the horizontal map distance to horizontal ground distance. Stream channels radiate outwards like wheel spokes from a high point. characteristics of contour lines: 1. What type of tectonic plates are present? What feature(s) can you observe south of Hwy. exaggeration: Write your answer in feet. What are the different types of handrails used in bridges? For producing a detailed study of A darker, heavier contour line that is labeled with an elevation. Earthwork estimations for any type of structure like bridges, dams or roads can be found out with the help of contour intervals in a map. To determine the %slope from Point A to Point B, the rise and run must first be determined. Observe the velocities of waves on the graph. What bearing would you need to walk to go to the Smithsonian from the monument? Figure 2 is based on a more complicated landscape that I contoured using a dark pen at a 10 m contour interval and using a lighter pen at a 5 m contour interval. Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. B. Construct flow lines emanating from each point " x " to illustrate the groundwater flow field on the map. Mountain/Hill Depressions BIOMEDICINE: Digestive System | Description o. The contour interval is stated on every topographic map and is usually (2 pts) What is the gradient between Garibaldi Lake and Mount Price? d. Is the elevation of waypoint D > or < waypoint C? Do Pole movements seem to be steady every 100 years or variable? Join now! (5 pts) The following topographic map (Map 7-E3) is from a coastal area and features an interesting geological hazard in addition to the ocean. 11. 750m. The number of contour lines in-between 7000 and 7100 are 4. Its Calculation, Uses and When it is Required, Factors Affecting the Selection of Contour Interval. how old is the sequence of rocks. Write your answer in feet. Lay a strip The image to the left shows a perspective view of a river mouth at the head of a valley between a steep cliff (to the left) and a smoother slope (to the right). Examine unconformities 1 and 2 indicated in Figure 1.9. In which stage of the cycle of stream erosion is this area? 1. on a map that are produced from connecting points of equal elevation (elevation To illustrate what these hills look like in profile (or, how they would look if you saw them while standing on the ground and looking at them . In the context of evolution through natural selection, explain why multicellular organisms have specialized exchange systems and surfaces. It is a plane section of the three-dimensional graph of the function f parallel to the-plane. Does your topographic profile show any peaks or valleys? long-term time-average of sea level). How far is that distance (0.56 miles) in Kms? In which direction does it flow? shows the surface features, or topography of Earth or a certain area. Would you expect the gradient of the Missouri River in Nebraska to be greater or less than the gradient that you calculated for the Grape River in Colorado? Vertical exaggeration is the effect that is created when the horizontal and What color shows buildings, bridges and railroads? Want to create or adapt books like this? The small contour interval, the survey work and plotting have to be more accurate. Give the elevation of the highest and lowest contour lines as well as the difference between them. It will take approx. the "V" points to the area of higher elevation or upstream. Which one travels faster? Show your work! Streams/Rivers Escarpments/Cliffs Determine the direction of the slope (aspect) from the index contour line to your location by drawing an arrow from the index contour line to the next higher elevation contour line. Math can be challenging, but with a little practice, it can be easy to clear up math tasks. If you examine the graph showing the topographic profile in Figure 3.6, can you imagine what would happen to your profile if we changed the spacing for elevations on the y-axis? 500/10=50 Use a contour interval of 4 inches. The more closely spaced the Answer: B. 19. The contour interval (height difference from one contour line to the next) on the 500 mb height map shown above is 3 decameters (abbreviated as 3 dam) or 30 meters (abbreviated as 30 m). This plate boundary isn't as simple as the previous examples, meaning another nearby plate boundary directly influences it. TAs names: _______________ _______________. An excerpt from a contour map is shown below. The terms below the entire earth to a city block (or less). Contour lines are used to show elevation on a topographic map. Trees growing in denser stands experience more competition for essential resources, which can make them more vulnerable to disturbances. Please hand in this lab to your TAs at the end of the lab period. The difference between adjacent contour lines. 2. Learn more about how Pressbooks supports open publishing practices. A contour interval is a vertical distance or difference in elevation between contour lines. First, we compute the activation . These features you are seeing are linear valleys. The other side is covered with a layer of fiberglass 2.5cm2.5 \mathrm{~cm}2.5cm thick. Expert Answer. In a large map, index contour lines are less to keep it simple to read the map easily. b. The contour interval is 20'. Why are colors and symbols used on topographic maps? examine the unconformity shown in figure 1.10. what type of unconformity is this? 60 seconds. A contour is a line drawn on a map that joins points of equal height above sea level. of a hill (or hills). Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. See example under CONTOUR/SPACING below. For small contour interval, the money required will also more as the field and office work will be more. Write your answer in feet. 3. What is the gradient? Refer to the figure below. -- - . The older unconformity is a Nonconformity, while the younger is a Disconformity. far apart represent gentle slopes. Please give your answer in grams/milliliter. Figure out math tasks Determine Contour Interval and Contour Line Values. Search for the "Washington Monument" and zoom into 3000 feet eye altitude. Contour line art is a method of drawing where you draw only the outline of an object, without any shading. At what depth will the dry mantle rock at point X begin to melt if it is uplifted closer to Earth's surface and its temperature remains the same? Note: The intervals are increasing, therefore, the contours indicate a hill. Joyce McBeth; Karla Panchuk; Tim Prokopiuk; Lyndsay Hauber; and Sean Lacey, 1.3 GEOLOGY & RESOURCE MAPS FOR CANADIAN PROVINCES & TERRITORIES, 1-E1 LAB EXERCISES CANADIAN GEOLOGY & MINERAL AND ENERGY RESOURCES, 1-E2 LAB EXERCISES REGIONAL GEOLOGY & MINERAL AND ENERGY RESOURCES, 2-E1 LAB EXERCISES MINERAL IDENTIFICATION, 3.5 IGNEOUS ROCK FORMATIONINTRUSIVE VS. EXTRUSIVE, 3.6 LAB EXERCISES IGNEOUS ROCK IDENTIFICATION, 4-E1 LAB EXERCISES SEDIMENTARY ROCK IDENTIFICATION, 5.4 LAB EXERCISES METAMORPHIC ROCK IDENTIFICATION, 6.7 LAB EXERCISE CHOOSING ABSOLUTE DATING METHODS, Answers to Practice Lab Exercises in section 7-E1, 8.6 GEOLOGIC STRUCTURES CREATED BY PLASTIC & BRITTLE DEFORMATION, 8-E5 EXERCISES COMPLEX GEOLOGICAL MAPS & CROSS-SECTIONS, 9-E1 LAB EXERCISE LOCATING AN EPICENTER, 9-E3 LAB EXERCISE HISTORICAL EARTHQUAKE, 10.3 STREAM GRADIENT AND THE CYCLE OF STREAM EROSION, Introductory Physical Geology Laboratory Manual First Canadian Edition (v.3 Jan 2020), https://pub.data.gov.bc.ca/datasets/177864/pdf/092G/092G095.pdf, Next: Extra Practice Question on Topographic Maps, Introductory Physical Geology Laboratory Manual First Canadian Edition (v.3 - Jan 2020), Creative Commons Attribution-ShareAlike 4.0 International License. What is the approximate map relief? Therefore, if you print it out in black and white please refer back to the electronic copy to avoid confusion. What type of stream drainage pattern is present on this map? When you join you get additional benefits. 50m. What would cause two separate samples of pure water to have slightly different pH\mathrm{pH}pH values? The column and row indices of Z are the x and y coordinates in the plane, respectively. (The benchmarks have an "x" to locate the spot where the elevation was surveyed). (5 pts) Figure 7-E4 shows five waypoints (A, B, C, D, and E) on a topographic map. Question 14. Figure 2 is the cross section along line AB. The Grand Canyon is an extraordinarily steep area. Given that San Francisco is located on the North American Plate and Los Angles is located on the Pacific Plate, are these two cities getting closer together or farther apart over time? Biology, 22.06.2019 02:10. How is the top of a mountain shown on a topographic map? a. It is impossible to determine which location is higher. any point by finding the nearest labeled line, counting the number of lines What does each contour line on a map show? Lost your password? Low gradient and abundant sediment supply. within the sequence is a distinctive clay layer that under closer inspection is fine grained volcanic ash. In which zone do the P wave velocities appear to be steadily increasing? 10. For example, the first hill on the left has a top contour line of 50ft. USask GEOL 121 Rock & Mineral Quiz Information, 8. Among other things, a topographic map can be used to measure the average slope C. Submergence and deposition of sedimentary layers 10-13. Take that distance and divide it by the speed you calculated in question 3 to estimate when the next supercontinent will form. Why do you think then that only a 1-2 drops of indicator is used in an acid-base titration? Notice the tick marks pointing toward lower elevation. Example 4- What is the slope percent in Exercise 2 above? f. Is the elevation of waypoint C > or < waypoint B? (1 pt) Explain in a sentence how a ratio scale works. Creating What is the benchmark elevation at Sloans Crossing? Please give your answer in grams/milliliter. "Contour" actually means "outline" in French, which is where the name comes from. 0.5 in 24,000 in/in = 12,000 in Legal. Based on the drainage pattern type, does the bedrock underlying this area consist of rocks uniformly resistant to erosion or rocks alternating between resistant and non-resistant layers? The figure above illustrates various topographic features. How far (in Km) did the pole move in one year during this time period? When connecting the points on your graph paper in the area between the two hills in Figure 3.6, you again want to round out the area to represent the base of your valley between the hills, but be careful not to make the valley floor too deep, as according to the topographic map the elevation is below 40ft, but not as low as 30ft. What is the dc collector resistance? 2. As a rule, hilltops will be slightly rounded to show a slight increase in elevation to represent the crest of the hill, but be careful not to draw the hilltoptoo high on your graph paper. Contour Lines It is impossible to determine which location is higher. First, we must identify the two contours that lie on either side of "P." In some cases the contours that we need are clearly labeled; however, in other instances, you will need to use the contour interval (1,000 feet, in this case) to "count" up or down from a labeled contour. Look closely at the topography south of highway, and it changes abruptly. Control of the body is accomplished by which of the following body systems? MATLAB automatically selects the contour lines to display. Q. How does the direction of motion of the Pacific Plate during the last 1.1 million years differ from direction of movement between 4.7 and 7.2 million years ago? In most maps, every fifth contour line is an index contour. Adjacent means next to. What is the relief (difference in elevation) between Little Tomah Lake and the top of Tomah Mountain (look for "Tomah Mtn")? If you were to walk the path of a contour line in real life, you would remain at the same elevation the whole hike, never traveling up or down. Step 2. The following are general characteristics of contour lines: 1. The word contour comes from French, and it is defined as meaning the "outline" of a subject, it often defines a form or an. 200 feet. Horizontal example. How far have the snake fossils moved apart since they were originally deposited? (2 pts) What is the ratio scale used on this map? (Answer to the nearest foot.) For consistency, assume that elevations between contour lines are 1/2 a contour interval higher than elevation of the lower line. 3. Contour lines that are far apart show what type of slope? Show your work. Now draw contour lines on your map to represent the pyramid in three-dimensions on your map. What do close contour lines represent on a map? Widely separated contour lines indicate a gentle slope. Comparable to figure 8 D-F in ref. At 75 km depth, rocks will be heated to about _______ degrees Celsius. Of the following dated flood events, which one would you expect to happen more often? Vertical on a topographic map base. The distance between these areas is ~1.6 miles (measured along the curving distance of the non-magnified stream). If the arrow is pointing toward the contour lines around your location, your location is a higher elevation than the index contour line. The speed the islands are sinking can be estimated by measuring the difference in elevation between two islands and dividing by the difference in their ages (this method assumes the islands were a similar size when they were active). Controls the size of characters in the contour labels; default is 0.08". 8,194,375 years to sink. Mathematically, a contour line is a curve in two dimensions on which the value of a function f (x, y) is a constant. When the vertical dimension of your graph is different from the horizontal dimension on your map, you may end up with a graph that shows a vertical exaggerationand the features of the Earth represented by your topographic profile may be deformed such as in Figure 3.7. The. Convergent (Continent-Ocean or Ocean-Ocean). All Rights Reserved. 1 What is the contour interval on this map? D 009 -800 N O a) 10 b) 20 D -600 -800 N a) 10 Ob) 20 c) 40 d) 50 Which point (A,B,C, D) has an elevation of 344 feet? 31? What type of tectonic plates are present? The gradient of a steam or river is determined by measuring a section of which of the above geologic events is the second in the sequence, which of the above geologic events is the fifth in the sequence. This makes reading the map easier. Difference of annual-mean surface zonal wind stress (N m 2) computed as the simulation with flattened topography (FLAT) minus control (ALL) from ref. Each contour line shows a different elevation. A topographic map may or may not include shaded relief to help visualize steep slopes. in Figure 9.4, what is the elevation of the intersection of U.S. Route 1 and Maine Route 6 in Topsfield? At 500 degrees Celsius, rocks will be buried to about _______ km depth. The desired unit is feet. Use the slope percent equation and solve. look at a map of the Sulphur-Boundary Creek area along the Middle Fork of the What type of bedrock is present in this area? How far did the pole move? Show that the streamlines of \nabla \varphi are orthogonal to the level surfaces of \varphi. On large-scale maps with a lot of topographical detail, the contour interval is usually smaller, while on small-scale maps with less detail, the contour interval is larger. slope percent = (120ft / 1000ft) 100 = 12% Index contours are prominent or dense lines that bob up at every 5th isometric line. Considering the size of the area to be mapped, contour intervals are assumed. The result is expressed in feet per mile (ft./mi.). Which of the three proposed plate tectonic mechanisms would NOT occur at this location? What is the area of the slab? The intervals +4tt and 4tt, then, respectively showed intervals ascending and descending from the tonal centre. What direction is the North American plate moving in comparison to the Pacific Plate at this location? What approximate discharge would be associated with a 50 year recurrence interval? A slope is easy to recognize in a hilly area. In every map, on the right-hand bottom side, the contour interval is described. Chapter 3 Topographic Maps by Karen Tefend and Bradley Deline, CC BY-SA 4.0. Location B is higher. In the given figure contour interval is 50 feet.
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