Cross section It is supposed a hill has been cut vertically, then we can see the side view, or cross section of the hill A section is a slice vertically down through the land. A cross section shows the shape of the lands.

View from the side View from the top

Cross section It is supposed a hill has been cut vertically, then we can see the side view, or cross section of the hill. A cross section can tell us the shape of the hill.

Cross Section Draw a straight line connecting the two points (X & Y).

Cross Section Take a strip of paper along the straight line Mark point X and point Y on the edge of the paper

Cross Section On the paper strip, mark the position of X and Y Mark all the contour lines and their heights between the two points

Cross Section Draw a frame for the cross section. The length of the base line is the same as the length of the straight line The two points X and Y also is marked on the two ends of the base line. M

The height must be started at 0 unit Cross Section The height must be started at 0 unit Decide the vertical scale of the cross section. On the left-hand side of the frame, mark the height at the regular interval. The highest mark must just be higher than the one on the paper strip. M

Cross Section M On the frame, draw the horizontal lines for each height interval. On the top of the left hand side of the frame, mark ‘meter’ for the unit of the height Put the paper the strip at the bottom of the frame, with X and Y touching both ends.

Cross Section Use a pencil to draw a perpendicular line from each marking on the paper strip unit it reaches the horizontal line with the same height. Mark a small “x” on the horizontal line. Join all the points with a smooth line.

Cross Section

Y X metres 30 20 10