Topographic maps - Gradient & Slope

Front

If the lines are close together on the map, it means that the rise/drop is ________________

Back

Steep

Front

If the lines are far apart, it means it is a slow or ________________ rise/drop

Back

Gradual

Front

What is the approximate gradient along the straight dashed line between points X and Y?

Back

150 m/km

Front

What is an index contour line?

Back

An index contour line is a prominent contour line that is labeled with its elevation.

Front

What is the gradient between points A and B?

Back

10 m/km

Front

What does a contour line represent on a topographic map?

Back

A contour line connects points of equal elevation.

Front

How do you calculate gradient?

Back

Gradient = (Change in elevation) / (Horizontal distance)

Front

What does a steep gradient indicate about the terrain?

Back

A steep gradient indicates that the terrain rises or drops sharply.

Front

What is the significance of index contour lines on a map?

Back

Index contour lines help to quickly identify elevation levels.

Front

What is the difference between a steep slope and a gradual slope?

Back

A steep slope has closely spaced contour lines, while a gradual slope has widely spaced contour lines.