Matric Geography 3

Question 1

On a topographic map, what does a contour line represent?

Accepted Answer

A line connecting points of equal altitude above sea level

Answer

Contour lines join all points on a map that are at the same height (altitude) above sea level, allowing the shape of the terrain to be read from a flat map.

Question 2

On a 1:50 000 topographic map, two points are 4 cm apart. What is the actual ground distance between them?

Accepted Answer

2 km

Answer

Ground distance = map distance × scale denominator: 4 cm × 50 000 = 200 000 cm = 2 000 m = 2 km.

Question 3

What is the contour interval on a map?

Accepted Answer

The fixed difference in elevation between consecutive contour lines

Answer

The contour interval is the constant difference in height between two adjacent contour lines, determined by the map's scale and purpose.

Question 4

Which of the following is a direct consequence of deforestation?

Accepted Answer

Increased soil erosion by wind and water

Answer

Without tree roots binding the soil, deforested land is highly vulnerable to erosion by rain and wind, leading to soil degradation and sedimentation of rivers.

Question 5

What is the primary chemical cause of ozone layer depletion in the stratosphere?

Accepted Answer

Chlorofluorocarbons (CFCs)

Answer

CFCs release chlorine atoms when broken down by UV radiation in the stratosphere; each chlorine atom can destroy thousands of ozone molecules.

Matric (NSC) Exam Practice Practice Test

Matric (NSC) Exam Practice Practice Test

Matric Geography 3