If you have ever taken a bathtub while an extremely dirty, you may have actually noticed a gritty “bathtub ring” left behind once the water drains out. An massive example of this phenomenon have the right to be checked out in Lake Mead, a reservoir near Las Vegas, Nev. Decades of declining rainfall, merged with increasing need for water, have actually caused water level in the reservoir to gradually drop, leaving behind a ring that white rock. (The white outcomes from mineral deposited on the rock surface ar under water.) due to the fact that the ring to represent a water surface, the ring develops a line the is perfectly horizontal and of same elevation over sea level. In other words, the ring is a contour line!
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Students can use a similar method to create contour lines through the structure Topographic Maps Gizmo. A companion to the reading Topographic Maps Gizmo, the Gizmo permits students to create contour present by increasing or lowering the water level in a landscape. Starting with a randomly produced 3D landscape, students have the right to raise or lower the water level and also then trace a edge line wherein the water meets the shore. After developing their map, students can practice other map skills, such as producing a profile of their map.
Start making use of this and other Gizmos today! sign up because that a cost-free trial.
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