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

___________ rises almost uniformly from the surrounding land.

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

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

__________ is known as horizontal equivalent.

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

A __________ is represented by very closely spaced contour lines on a map with the innermost contour showing small gap between its two sides.

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

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

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