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Focus on Topographic Maps

10/7/2009

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A topographic map is a map that allows you to see hills, mountains, slope and elevation.   Elevation is how high something is.

When we talk about elevation, or height, we compare land forms to sea level.  The level of the sea being 0.   All elevation is either above sea level or below sea level.

A topographic map actually looks at the land and shows us elevation.  We can also see how steep something is and how flat an area of land is.

A topographic map is simply a series of circular lines called contours.  These contour lines can never intersect.  They are called Isolines.  In this case, they show elevation.  The contour interval is the distance between the lines.

A topographic map will demonstrate changes in elevation.  The contour lines show and tell you a big story.  The closer the contours, the more steep the slope.  Contour lines that are farther away from each other are gentle slopes or even flat areas.  

Isolines can also be used for demonstrating other changes, like temperature zones.

Contour Worksheet done in class

Gradient Worksheet to do for HW
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  • Home
  • Earth Sci Labs
  • 7th Grade ON-LINE TEXTBOOK
  • 7th Grade
    • 7th grade Lab Reports
    • Current events
    • 7th 1- Scientific Theory
    • 7th Lanforms & Maps >
      • Mountain Project
      • Mineral/ Gem Project
    • 7th 3- Geology >
      • Weathering & Erosion
      • Fossil Project
      • Plate Tectonics
      • Earthquakes
      • Unit Test Review
    • 7th Unit 4 Atoms >
      • 7th Atom Brochure
  • Student Contact Info Form
  • Submit Homework
  • 8th Grade Units 1-4
    • Unit 1 Models of the Earth >
      • Metric Review
      • Chapter1 Review
      • Chapter 2
      • Topographic Maps
    • Unit 2 Rocks & Minerals >
      • Minerals
      • Rocks
    • Unit 3 Dynamic Crust >
      • Earthquakes
      • Earthquakes & Interior
      • Hot Spots
      • Volcano
      • Dynamic Crust Review >
        • Practice Tests
    • Unit 4 Shaping the Earth's Surface >
      • Weathering
      • chemical weathering
      • Another Weathering video
      • Erosion Videos
      • Glaciers >
        • Glacier Pwr points
      • Changing Earth
      • Unit Review
  • 8th Grade Units 5-9
    • Unit 5 Earth History >
      • Archean History
      • Geological Eras
      • Geologic Sequence Project
      • Unit 5 Review
    • Unit 6 & 7 Climate & Meteorology >
      • 801 Vacation Work
      • Weather Tracking HW Lab
      • Meteorology info
      • Station Models
      • Wind
      • Storms
      • Weather & Climate Review Tests
    • Unit 8 Earth & Space
  • 801 Test Review
  • Ways to pass the regents
  • files
  • Other Important Links
  • New Page