Choose the correct option.

1. A narrow gap in a mountain range that provides a passage through it is called _____________________
   1. col 
   2. saddle
   3. pass
   4. gap
2. Every fifth contour line is drawn bold, and is known as the __________________________.
   1. contour index
   2. contour interval
   3. contour legend
   4. contour range
3. Nucleated settlements are commonly found in ___________________.
   1. hilly areas
   2. river valleys
   3. deserts
   4. forested areas
4. The settlement in which houses are build in a line is ______________________ settlement.
   1. dispersed
   2. compact
   3. linear
   4. radial

Fill in the blanks.

1. Closely spaced contour lines indicate a  _________________ slope.
2. The top of a hill is called a ___________________ or a peak.
3. A narrow, elongated hill with steep slopes is called a _______________________.
4. In a ___________________ settlement, people stay for long duration.

Mark the wrong statments and correct them.

1. The contour lines are shown on a topographical map by black lines.
2. A ridge is represented on the map by elliptical contours that are widely spaced.
3. A mountain pass that has been lowered in height by the action of river is called a gap.
4. A saddle is a narrow passage in a mountain range.

Which organisation is responsible for the publishing of topographical maps and sheets in India?

Define the term 'contour interval'.