what is the contour interval for the figure below?
If the numbers associated with the contour lines are decreasing, there is a decrease in elevation. They then cross the stream and turn back along the opposite bank of the stream forming a "v". In which zone do the P wave velocities appear to be steadily increasing? This makes reading the map easier. 11. Show your work. Contour Lines: Contour lines are used to determine elevations and are lines on a map that are produced from connecting points of equal elevation (elevation refers to height in feet, or meters, above sea level). This means every point on a contour line has the same altitude as that of the assumed intersecting surface. Step 4. Index contours increase by 250. (1 pt) Contour intervals located on this map are few and far between. Index contours are prominent or dense lines that bob up at every 5th isometric line. Based on the map below, which location has a greater elevation, A or B? The difference between adjacent contour lines. In Figure 9.4, what is the elevation of Malcome Bog? Observe the S wave velocities. Which of the following places represent a Wadati-Benioff zone? How to Calculate Contour Interval from Maps? These circular patterns indicate hilltops, like in the diagram below (Figure 3.6). on a map that are produced from connecting points of equal elevation (elevation BIOMEDICINE: Digestive System | Description o. Contour lines do not cross each other, divide or split. A contour interval is a vertical distance or difference in elevation between contour lines. Closely spaced 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. Why would a smaller ratio scale be used for this map in comparison to the Garibaldi map? Contour intervals must be obeyed, therefore the contour line elevations can only be multiples of the contour interval . maps also have a vertical scale to allow the determination of a point in three It is usually every fifth line that indicates a change in elevation. 400 D. N a) point A 00 D. N a) point A b) point D c) point B d) point Follow the creek along its path. Note: if you are unable to read the contours on the map, view the original map on the web or look at the large printed copy in the lab. A contour line is a line drawn on a topographic map to indicate ground elevation or depression. Are streams in this area downcutting or laterally eroding? Slope Worksheet (to be completed), Contact Us: NWCG Comments & Questions | USA.GOV | Notices | Accessibility | Copyrights | Linking Policy | Records Management | FAQs, M-581, Fire Program Management Course Steering Committee, M-582, AA Advanced Wildland Fire Course Steering Committee, Committee Roles and Membership Information, Course Steering Committee Guidance & Templates, International Association of Fire Chiefs Roster, National Association of State Foresters Roster, Alternative Pathways to NWCG Qualification, Wildland Fire Leadership Development Program, Table 5.3 Perimeter Estimation for Point Source Fires, Table 5.4 Area Estimation for Point Source Fires. What is the contour interval? available from: Open Geosciences. Explain why. What is the dc saturation current? What does each contour line on a map show? please add a brief explanation thank you Hint- make sure to re-read the section on plate boundaries before answering! which of the above geologic events is seventh in the sequence. 1. Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes. Would the recurrence interval for this flood plot at: Is it possible that a flood with a similar discharge to that of the event from 9/23/2009 could happen again in the next 20 years? Determine the elevation at Point A and Point B in the Figure 9 map below. Which of the three proposed plate tectonic mechanisms would NOT occur at this location? An excerpt from a contour map is shown below. backward or by clicking on the arrows above and below the eye in the upper USGS topographic maps also show many other kinds of geographic features including roads, railroads, rivers, streams, lakes, boundaries, place or feature names, mountains, and much more. The highest point on a topographic map is marked as 345m. Step 3. The purpose of this lab is to familiarize students with how to read and use topographic maps. 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. Biology, 22.06.2019 02:10. You can figure out the elevation of For small contour interval, the money required will also more as the field and office work will be more. Contour lines Assume that water flowed through these valleys at some time. on a topographic map base. What Is Contour Interval? This page titled 3.6: Drawing Contour Lines and Topographic Profiles is shared under a CC BY-SA license and was authored, remixed, and/or curated by Deline, Harris & Tefend (GALILEO Open Learning Materials) . Dont forget to add a contour line to the map legend! Example 4- What is the slope percent in Exercise 2 above? 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? If the river on this map is 1.93 miles long, what is the gradient for this river? (Hint: Speed= Distance/Time). Keeping the abrupt topography change in mind, which of the following is true? Sharp contour points indicate pointed ridges. Also no adds. Lines or isolines on a map that connect points with the same elevation. Now draw contour lines on your map to represent the pyramid in three-dimensions on your map. Refer to the figure below. How fast was the Pacific plate moving from 7.2 million years ago to 4.7 million years ago between the formation of Kauai and Nihoa in cm/year? Its Calculation, Uses and When it is Required, Factors Affecting the Selection of Contour Interval. In most maps, every fifth contour line is an index contour. Note: there is technically more than one correct answer for some of these questions. What type of tectonic plates are present? -- - . What type of tectonic plates are present? examine the unconformity shown in figure 1.10. what type of unconformity is this? Search for the "Washington Monument" and zoom into 3000 feet eye altitude. Put simply, contour lines mark points of equal elevation on a map. Convergent (Continent-Ocean or Ocean-Ocean). The zone from 5100-6400 represents the Earth's ? If you trace the length of a line with your finger, each point you touch is the same height above sea level. By using a ruler, you can transfer these elevation points from your topographic map straight down onto your graph paper such as shown in Figure 3.6. 2009-2021 The Constructor. Index contour lines: Every fifth contour line is a thicker, "index" line.At some point along that line, its exact elevation is listed. Lay a strip USask GEOL 121 Lab Final Exam Overview. Why do you think then that only a 1-2 drops of indicator is used in an acid-base titration? (a) Suggest what the 100S100 \mathrm{~S}100S and 130S130 \mathrm{~S}130S particles might represent, in light of current knowledge of protein synthesis. The. which of the following is the best way to obtain an absolute date for the sequence of rocks, the geologist determines there is 78.3% of the parent remaining in the sample that they examine. In Figure 9.4, what is the elevation of the highest point on Farrow Mountain? (The benchmarks have an "x" to locate the spot where the elevation was surveyed). Suppose that (x,y,z)=i+k\nabla \varphi(x, y, z)=\mathbf{i}+\mathbf{k}(x,y,z)=i+k. If the arrow is pointing toward the contour lines around your location, your location is a higher elevation than the index contour line. Sharp contour points indicate pointed ridges. 1) The contour interval between contour is 40m. Would this be an easy location to maintain a railroad? The steepest path on a topographic Surface is always perpendicmar to topographic contour at the point where the flowline crosses the contour. 31W. (3 pts) Based on the scale chosen for you for the topography (vertical axis), calculate the amount of vertical exaggeration on the topographic profile you constructed for question 4. 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). If you go from the river at (36 05 35.38 N 113 14 43.70 W) Straight up north the canyon rim (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. Information Line 1 starts with the contour interval, not the projection point. 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. 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? To keep the contour map simple and easy to read, not every contour line is marked with its elevation reading. f. Is the elevation of waypoint C > or < waypoint B? Horizontal Location B is higher. Write your answer in feet. USask GEOL 121 Rock & Mineral Quiz Information, 8. Introductory Physical Geology Laboratory Manual First Canadian Edition (v.3 - Jan 2020) by Joyce McBeth; Karla Panchuk; Tim Prokopiuk; Lyndsay Hauber; and Sean Lacey is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted. 7. the "V" points to the area of higher elevation or upstream. They are usually mapped with small contour intervals. 12. To calculate this divide the distance (in centimeters) between the two islands by the difference in their ages, Examine the headings of the measurements that you took for the previous two questions. A topographic profile along the A - A' line is shown correctly in: What is the longitude for the northwest corner of the map? A contour line is a line drawn on a topographic map to indicate ground elevation or depression. As a contour approaches a stream, canyon, or drainage area, the contour lines turn upstream. What do close contour lines represent on a map? Vertical 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. Both A and B (20-2900 Km and 2900-5100 Km). Observe the velocities of waves on the graph. fairmount. Start climbing from the foot of a hill toward the top, this is called a rising slope (see Fig. What is the elevation of the base of the monument in meters? All contour lines are spaced at a 20 m contour interval. Lets assume, 7000 and 7100 and calculate the interval between it. scale on profile paper by labeling the horizontal lines corresponding to the A low relief. 46, black arrow). The Grand Canyon is an extraordinarily steep area. They also show some features made by people such as brodges. Where does it wind up? What is the relief (difference in elevation) between Little Tomah Lake and the top of Tomah Mountain (look for "Tomah Mtn")? How fast was the Pacific plate moving during the last 1.1 million years between the formation of the Big Island and Maui in cm/year? To take the difference, subtract the higher elevated line with the lower elevated line reading. the entire earth to a city block (or less). Use the slope percent equation and solve. 9. Contour Lines Contour lines that are far apart show what type of slope? Was Carter Lake cut off before or after the state boundary between Nebraska and Iowa was drawn? Contour lines are used to show elevation on a topographic map. 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 . 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? The horizontal map distance measures 0.5 inches. right hand portion of the window. How far is that distance (0.56 miles) in Kms? The smallest circles represent the Contour values are in feet. These circular patterns indicate hilltops, like in the diagram below (Figure 3.6). The distance between these areas is ~1.6 miles (measured along the curving distance of the non-magnified stream). 0.5 in 24,000 in/in = 12,000 in Approximately how far did the pole move per day? If you were standing at the washington monument what direction would you need to walk to get to the U.S. capitol building? A contour interval is a vertical distance or a difference in elevation between contour lines in a topographic map, index contour lines are bold or thick lines that appear on every fifth contour line and if the number associated with specific contour lines is increasing, the elevation of the area is also increasing. be found. They also show elevation. This may be easier to determine by examining the tributaries to the main stream. For all of the following figures, assume north is at the top of the map, and south at the bottom. Select the correct answer(s) from the questions below: The horizontal distance between points A and B can be measured with a scaled ruler and used to determine the slope percent. Q. Note: The intervals are increasing, therefore, the contours indicate a hill. A. Contour the water table data, using a contour interval of 10ft. The contour music definition is the same definition in any medium such as visual art,. Therefore: Rise = change in elevation = top (Point A elevation) minus bottom (Point B . the result from the nearest marked contour line. Refer to Problem 14.1 for guidance. Which one travels faster? Explain why. On which date did a flood event have a recurrence interval of 0.5? Refer to the figure below. In what general direction is the Pacific Plate moving? The word contour comes from French, and it is defined as meaning the "outline" of a subject, it often defines a form or an. he areas enclosed by contour lines at 5 m interval for a reservoir upto the face of the proposed dam are as shown below value of Contour lines 100,510l0,1015,1020,1025,1030,1035 Area (m2) 653/2 ,653, 653*2, 653*8, 653*18 ,653*25 , 653*40 Taking 1005m and 1035 m as the bottom most level and the highest water level achievable of the reservoir. Forests across much of the United States are becoming denser. Vertical exaggeration is the effect that is created when the horizontal and "Contour" actually means "outline" in French, which is where the name comes from. within the sequence is a distinctive clay layer that under closer inspection is fine grained volcanic ash. To determine the elevation of a point on a topographic map: The highest point of the rim of the crater is about 350. 8,194,375 years to sink. Measure the distance, using bar scale, between the pole in 1400 and 1500 (locations C and D). Now count the number of non-index lines contour lines between the 2 index contour lines selected for the contour interval calculating in the 1st step. The column and row indices of Z are the x and y coordinates in the plane, respectively. a stream. map. What type of plate tectonic boundary is at this exact location? A slope is the rise or fall of the land surface. What type of tectonic plates are present? The more closely spaced the 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). The Zone from 0-20 km represents the earths? To show different features of Earth's surface. in the southern portion of the map, the area is underlain by limestone. Flood stage, or bankfull stage, on Sweetwater Creek occurs at a discharge of ~4,500 cfs. interval. In the given figure contour interval is 50 feet. The contour interval is stated on every topographic map and is usually Measure in centimeters the distance (Map Length) between the two points you recorded in the previous question. Vertical If you were standing in the middle on the intermost contour line hill "c", your elevation would be. Location A is higher. For this computation, the rise, or vertical ground distance, and run, or horizontal ground distance, are needed. S waves cant travel through liquids and this depth is where the liquid outer core exists. Considering the size of the area to be mapped, contour intervals are assumed. 2. How are depressions marked on a topographic map? 19. Considering the above map, the steps involved in contour interval calculation are. What is the straight line distance between the 8996 b and the 7202 b benchmarks located north and northwest of Phelps Lake? B. Construct flow lines emanating from each point " x " to illustrate the groundwater flow field on the map. What is the term for the geologic feature called Carter Lake? Index contours are bold or thicker lines that appear at every fifth contour line. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing. Are the rocks likely tilted and folded or horizontal? According to your best fit line, what is the recurrence interval of such a discharge? When a large area is to be mapped in small piece of paper contour intervals are used. Example 2- Draw a profile showing the elevations of the contours. Question 14. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Clear up mathematic tasks. Answer: B. It is important for the farmer or irrigator to identify the slopes on the land. Widely separated contour lines indicate a gentle slope. Expert Answer. Where do the S wave velocities abruptly change? The direction of plate movement in the last 1.1 million years. The commonly used contour interval is 20 feet for a 1:24,000 map scale. 60 seconds. e. Place the paper Topographic look at a map of the Sulphur-Boundary Creek area along the Middle Fork of the Then add 1 to 5 that becomes 6. the final step is the quotient of the difference between 2 index lines (step 2) and the number of lines in between two index lines plus 1 (step 5). Stream channels radiate outwards like wheel spokes from a high point. Where do the P waves abruptly change? Write your estimates for the elevation at each waypoint next to the waypoint. The zone from 2900-5100 represents the Earth's ? Make sure to zoom out to get a good view of the relevant features. Closer distance indicates steep slope and wider distance gentle slope. You will receive a link and will create a new password via email. If you were standing in the middle on the intermost contour line hill "c", your elevation would be. 750m. Join now! For Ex: If the number of lines between 2 index lines are 5. Consider the ages and positions of the islands listed above along with what you know about plate tectonics and hotspots. At 75 km depth, rocks will be heated to about _______ degrees Celsius. 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. In every map, on the right-hand bottom side, the contour interval is specified. Source: Karla Panchuk (2020) CC BY-SA 4.0, adapted from Joyce M. McBeth (2018) CC BY-SA 4.0 (view source) and Brad Deline (2017) CC BY-SA 3.0 (view source). What is the area of the slab? For producing a detailed study of nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems . A thumbnail version of the map is shown in Figure 7-E10, a larger copy is provided at the back of this lab manual, and your TA will provide you with a full-scale version of the map in lab. On our map, point "P" lies between 3000 feet and 4000 feet contours . Please give your answer in grams/milliliter. (5 pts) Construct a topographic profile for the map inFigure 7-E6 from position A to A on the graph paper provided in Figure 7-E6 below. (b) Why do you think reassociation to 1005 and 130 S particles did not work? We further visualize the globally normalized responses of each convolution filter on the image of grating interval 6 in Figure 5 B. Lines: Contour lines are used to determine elevations and are lines They are marked with short, straight lines inside the circle. In a large map, index contour lines are less to keep it simple to read the map easily. 300 A. Observe the stream on the Omaha N, Nebraska-Iowa quadrangle. refers to height in feet, or meters, above sea level). It is impossible to determine which location is higher. As an example, Contour plots with Excel and Matplotlib Select the XYZ data arranged as a single range (Range I4:N8 in the data screenshot below). the profile line. 2. The horizontal distance between two points on two consecutive contour lines for a given slope is known as horizontal equivalent. If the relief is high (bigger change) you will need a bigger contour interval. Use the topographic map (Fig. (1 pt) Find Deadmans Lake (it is located close to Cheakamus River and south of Daisy Lake; refer to Figure 7-E8 which is a close up from the map area). 50m. In Figure 9.4, what is the elevation of the highest point on Hunt Ridge (keep in mind step #4 from the first question)? separating in cm/year? d. Prepare a vertical contour lines represent steep slopes, conversely, contour lines that are spaced During the flood event of 9/23/2009, the discharge measured at this gaging station was 21,200 cfs. Mark Figure 7-E9 with a line to indicate the distance you used in your calculation. First Edition. View Source. It will take approx. At 500 degrees Celsius, rocks will be buried to about _______ km depth. Sorry, you do not have permission to ask a question, You must log in to ask a question. Write your answer in feet. The even spacing indicates the hill has a uniform slope. Controls the size of characters in the contour labels; default is 0.08". Set up the cancellation table so all units will cancel, except the desired unit, feet. Do Pole movements seem to be steady every 100 years or variable? with the elevation of the contour it represents. which of the above geologic events is the second in the sequence, which of the above geologic events is the fifth in the sequence. which organism was the most useful in coming to this conclusion (best fossil index), which organism was the least useful in coming to this conclusion (worst index), how much of the parent isotope would be remaining after 7 half lives have passed, if a radiometric element has a half life of 425 yrs, how old would a rock be that only had 3.125% of the parent isotope remaining, based on your graph approximately how much of the parent isotope would be remaining after 3.5 half lives, based on your graph above approximately how many half lives have passed when only 35% of the parent isotope is remaining, an archeologist finds some cloth at a burial site and wants to determine the age of the remains. A higher contour interval is used for a large area and small contour interval for small area. The other side is covered with a layer of fiberglass 2.5cm2.5 \mathrm{~cm}2.5cm thick. as sinkholes, underlying soluble rock was dissolved and area collapsed. a view of the landscape as seen from above. How is the top of a mountain shown on a topographic map? Australia and Antarctica separated after the break-up of Pangaea. a) Label the elevation of every contour line on the map. What would cause two separate samples of pure water to have slightly different pH\mathrm{pH}pH values? When she treated such a mixture with EDTA, everything dissociated to 30S30 \mathrm{~S}30S and 50s50 \mathrm{~s}50s particles. on the paper the exact place where each contour, stream and hill top crosses
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