___________ are also known as general purpose maps.

___________ are widely spaced in the lower parts and are closely spaced in the upper parts.

__________ are deep and narrow river valleys with very steep sides.

____________ are prepared and published by the National Mapping Organization of each country.

The contours representing a ________________ merge into one another while crossing a river steam.

A slope with a gentle gradient in the lower parts of a relief feature and steep in its upper parts is called the __________.

__________ is represented by 'V' shaped contours but in the reverse manner.

_________ is generally expressed in metres.

_____________ are widely spaced in the upper parts and are closely spaced in the lower parts.

A ___________ is formed by strong lateral erosion of glaciers at high altitudes.