CELPIP Reading Part 3Reading for Information Practice

A. A flat map can show roads and rivers directly, but hills and valleys rise above or sink below the page. Simple shading suggests shape, yet it may not provide a measurable height for a particular location. Contour lines solve this problem by connecting points that share the same elevation above an agreed reference level. Together, many lines create a readable model of terrain without turning the map into a three-dimensional object. Viewed together, details about the challenge of showing land height on paper connect visible characteristics with processes that are less immediately obvious to an ordinary observer at first.

B. Every contour map uses a stated vertical interval between one ordinary line and the next. A map with a small interval can show subtle relief, while a larger interval simplifies steep or extensive terrain. Index contours are printed more strongly at regular steps and labelled to help readers calculate intermediate elevations. Except at unusual overhanging landforms, neighbouring contour lines do not cross because one point cannot have two ground elevations. Within use and interpretation of contour lines on maps, the result is a system in which structure, timing, and local conditions remain closely connected throughout continuing development.

C. Closely spaced contours indicate that height changes rapidly over a short horizontal distance and the slope is steep. Wide spacing shows a gentler incline, while nearly touching lines can represent a cliff. V-shaped bends often point uphill where contours cross a stream valley, helping readers infer the direction of drainage. Closed rings may mark a hill or a depression, so symbols and surrounding elevations must be checked before deciding which. Observations of reading slope and landforms from spacing show why the same process may appear somewhat different from one site to another as surrounding conditions continue to change.

D. Surveyors once combined measured angles, distances, and heights to plot contour lines through calculations and field notes. Modern maps often derive elevation from aerial, satellite, or laser measurements covering many points at once. Contours still simplify a continuous surface, and small features may disappear when the interval or map scale is too broad. Skilled readers therefore combine the lines with spot heights, symbols, and landscape knowledge rather than treating them as complete detail. Understanding use and interpretation of contour lines on maps therefore requires attention to both immediate effects and slower forms of change within the whole connected system.

E. Not given in any of the above paragraphs.