GEOLOGY

Detailed explanation-1: -In hilly areas, the contour lines are close together while they are wider apart on flat slopes. The closer the contour lines, the steeper the slope. The wider the contour lines, the flatter the slopes.

Detailed explanation-2: -In contouring, when there is less distance between the contour lines, the slope is steep. If the distance between the contour lines is great, the slope is gentle.

Detailed explanation-3: -Widely separated contour lines indicate a gentle slope. Contour lines that are very close together indicate a steep slope. The figure above illustrates various topographic features. (b) Notice how a mountain saddle, a ridge, a stream, a steep area, and a flat area are shown with contour lines.

Detailed explanation-4: -Characteristics of the contours: When contours are drawn closer to each other, it shows a steep slope on the ground and when they are far apart it shows the gentle slope on the ground.

Detailed explanation-5: -Answer. A gentle slope is characterised by contour lines spread widely apart because gentle slope has a low slope angle.