Question

State four factors that facilitate the formation of the sand dunes

Answer 1

• availability of sand
• Wind direction and velocity
• presence of obstacles e.g. rocks or vegetation
• Topography

Answer 2

Water

Answer 3

1. Presence of an obstacle
2. Wind direction
3. Velocity of the wind
4. Availability of sand
5. Topography of land

Answer 4

1 presence of vegetation
2 availability of sand
3 presence of an obstacle 
4 nature of the surface

Answer 5

Pretense of obstacle
Nature of the surface
Direction of wind