Building Topographic Maps Creating 3D Maps with Wa

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M2L4: Building Topographic MapsNameSeanna SerflatenDate:6/14/23Vocabulary: contour interval, contour line, elevation, profile, relief, topographic mapPrior Knowledge Questions (Do lhese BEFORE using lhe Gizmo.)The image below shows part of Lake Mead, lhe largest reservoir in lhe United States. Nolice lheband of while sediments above lhe water line. This band is known as the "balhtub ring.'How do you think lhe bathtub ring formed?Its a result of buildup of soap and other shower productsWhat do you notice about the boundary between the white sediment and dark rock above?the waler eroded lhe rock, lhe boundary between the white sediment and the dark rock aboveis two completely different colors.Gizmo Warm-upDue to gravity, lhe surface of a lake always forms a horizontal plane, wilh every poinl lhe sameelevation above sea level. The shore of a lake thus forms acontour line, or a line of equalelevation. TheBuilding TopographicMaps Gizmo"1" allows you Io create a topographic map bytracing lhe shore of a lake.Observe lhe 3D view of lhe landscapeSlowly increase lhe Water level (m).What do you see?Land submerged in water completely while others are nolAbout how high is the highest poinl on the map?9D0 metresActivity:Make a mapGel lhe Gizmo ready:•Click New.■Sei lhe Water level Io 0 m.Goal: Use water to create a topographic map.

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M2L4: Building Topographic MapsObserve: Slowly raise lhe Water level from 0mto1DOO m. Observe haw the appearance of thelandscape changes.Whal happens Io mountains as the water level rises?mountains are left dry until the flood water cavers them.Calculate The relief of a landscape is equal to lhe elevation difference between the highest andlowestpointsofthe landseape Usethe WaterIeveI siider to measure lhe elevalianaf Ihelowest point and the highest point in the landscape.What is lhe elevation of the lowest point inlhelandscape?100 metresWhat is lhe elevation of the highest poinl in the landscape?9DQ metresWhat is lhe relief of this landscape?8D0 metresCreate: Set the Water level to 9DQ m. (Note: You can enter a number directly intothebox totheright of the slider.) Click DrawContourto insert a contour line al this water level. Decrease lhewater level and draw other contours at SOD m, 70D m, 60D m. and so on until no water remainson the landscape.When your topographic map is complete, click the Tools menu and select Screen shot.Right click the image, selectCopy Image,and then paste the innage intolhespace below.Insert your map in lhe space below:Thecontour intervalof a map is lhe elevation difference between successive contour lines.What islhecontour interval ofyour map?10D metres

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