Question

What type of slope is indicated on a map by equidistant contour lines?
a: Gentle slope
b: Uniform slope
c: Steep slope
d: Concave and convex slope

Answer 1

Hint: A rising or falling surface of which one end is at a lower level than the other end is called slope. The rise or fall in a land surface is called a slope. A slope can be easily recognised in a hilly area.

Complete Step by Step answer: Option a: Gentle slope- The contour lines are close together in hilly areas while they are wider apart on plain slopes. The slope is gentle when the contour lines are wider apart. This is not the correct answer.
Option b: Uniform slope is indicated on a map by equidistant contour lines. A slope which has the same angle throughout. Contour lines will be spaced evenly on a map in uniform slope. This is the correct answer.
Option c: Steep slope- The contour lines are close together in hilly areas while they are wider apart on plain slopes. The slope is steep when the contour lines are closer. This is not the correct answer.
Option d: Concave and convex slope- The concave slope is very gentle at its foot and it becomes steeper towards the top. The contour lines on the map showing concave slope on the map are more at the lower level than the higher level. The convex slope is very steep at its foot and becomes gentle towards the top. Contour lines showing convex slope on the map are unequally spaced but sequenced in a way opposite to concave slope diagram. This is the incorrect answer.

Option b is the correct answer because uniform slope is indicated on a map by equidistant contour lines.

Note: The imaginary horizontal line which connects all the points in a plain which have the same elevation is called a contour line. The contour lines on the maps provide an indication of the changes in the topography of a field.