Q1
What do contour lines connect?
APoints of equal elevation
BPoints of equal temperature
CRandom points
DPoints of equal population
SSCClass 7 (SSC)Geography (भूगोल)Ch 11 · Topic 1
Contour Maps and Land Forms
Contour maps use lines to show elevation and landforms, helping us understand the shape and height of land features on a flat map.
Core concept
Contour lines connect points of equal elevation on a map, with closely spaced lines indicating steep slopes and widely spaced lines indicating gentle slopes.
How it works
Different landforms have distinct contour patterns - hills show concentric circles, while valleys show V-shaped contour lines pointing uphill.
Why it matters
The difference in elevation between two consecutive contour lines is called the contour interval, which remains constant on a given map.
Key detail
Reading contour maps helps us understand terrain features, useful for hiking, construction planning, and understanding geography.
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Quick notes
• Contour lines: connect equal elevation points.
• Closely spaced = steep slope.
• Widely spaced = gentle slope.
• Hills: concentric circles.
• Valleys: V-shaped lines pointing uphill.
• Contour interval: elevation gap between lines.
• It remains constant on a map.
• Contour maps aid hiking, construction, geography.