![]() State the three methods used to show the earth's relief features on a map. The relief features found on the earth's surface include mountains, valleys, hills, plains and plateaus. ![]() Relief refers to actual configuration of land which includes its altitude and slope. The contour lines are drawn at regular distances, and their value keeps on increasing towards the centre, where the lines suddenly show decrease in height at the centre, which is the depression. The contours are drawn almost at regular distances, the value of which increases towards the centre, which is the peak and represented with a dot.Ĭontours showing a depression are almost circular like a conical hill with a depression as their centre. The highest point of a mountain is known as a mountain peak.Ī depression is formed when there is a sudden decrease in height at the top of a conical hill.Ĭontours showing a conical mountain are almost circular with peak of the mountain as their centre. The side on which the ridge is steeper, the contours are drawn closely together, whereas the side on which the ridge is gentle, the contours are drawn far apart. It is a long and narrow highland sloping steeply downwards on its sides.Ī line which separates two adjacent drainage basins is known as water divide.Ĭontours showing a ridge are elongated and are closely spaced. The contour lines are closer to each other. The contours are placed wide apart in gentle slope.įor steep slopes, the contours are drawn close to one another.Ī scarp has a narrow top with a steep slope.Ī dip has a narrow top with a gentle slope. Normally about 1:25 gradient of elevation is gradual. In gentle slopes, the change of elevation is gradual. Explain how would you distinguish between the following on the basis of contours Question 1 The ratio between the vertical height and the horizontal distance of a slope of land measured along the ground is called gradient. The actual distance between two points on two contour lines is called horizontal equivalent. The vertical distance between any two contour lines is called vertical interval. For example, if one thick contour shows the height 300 metres and the next thin contour depicts the height of 320 metres. Spot height Describe the following terms Question 1Ĭontour interval means the difference of height between two consecutive contours. The accurate height of some point marked above the ground. The difference between maximum and minimum height in areas of steep slope. The numerical difference between two contour lines. Give the terms used in contours for each of the following Question 1
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