Mountains, valleys, and plains are landforms that shape where people live, travel, farm, and build. Maps help us recognize these landforms from above, even when we cannot see the landscape in person. By reading contour lines, symbols, scale, and direction, students can connect a flat map to real 3D terrain.
These skills matter in geography, earth science, hiking, city planning, and understanding natural hazards.
Key Facts
- Mountains are high landforms with steep slopes, often shown by closely spaced contour lines.
- Valleys are low areas between higher land, often shaped by rivers, glaciers, or erosion.
- Plains are broad, relatively flat areas, often shown by widely spaced contour lines or few elevation changes.
- Contour interval = elevation difference between neighboring contour lines.
- Gradient = change in elevation / horizontal distance.
- Map scale example: 1 cm on the map = 1 km in the real world.
Vocabulary
- Mountain
- A mountain is a high landform that rises steeply above the surrounding area.
- Valley
- A valley is a low area between hills or mountains, often with a river or stream running through it.
- Plain
- A plain is a wide, mostly flat land area with little change in elevation.
- Contour line
- A contour line connects points on a map that have the same elevation.
- Map scale
- Map scale shows the relationship between a distance on the map and the actual distance on Earth.
Common Mistakes to Avoid
- Treating contour lines like roads is wrong because contour lines show equal elevation, not paths for travel.
- Ignoring contour spacing is wrong because close lines show steep slopes while wide spacing shows gentle slopes or flatter land.
- Forgetting to use the map scale is wrong because distances on a map are reduced and must be converted to real-world distances.
- Assuming every low area is a valley is wrong because a true valley is usually between higher landforms and often has drainage patterns such as streams.
Practice Questions
- 1 A topographic map has a contour interval of 20 m. If a mountain peak is inside the 520 m contour line and above the 540 m contour line is not shown, what is the possible elevation range of the peak?
- 2 On a map, 1 cm represents 2 km. Two towns on a plain are 4.5 cm apart on the map. What is the real distance between the towns?
- 3 A map shows contour lines packed closely on one side of a landform and spread widely on the other side. Explain which side is steeper and how you know.