6_Soil Erosion and Pollution Quiz

Which of the following is a major cause of soil erosion?

• Drip irrigation

• Afforestation

• Deforestation

• Mulching

Which natural agent is mainly responsible for wind erosion of soil?

• Water

• Sunlight

• Air

• Earthquake

Which of the following practices helps in preventing soil erosion?

• Overgrazing

• Slash-and-burn farming

• Terrace farming

• Urbanization

Soil pollution occurs when soil becomes:

• Rich in minerals

• Mixed with sand

• Contaminated with harmful chemicals

• Wet after rain

Which of these human activities can directly cause both soil erosion and soil pollution?

• Organic farming

• Use of chemical fertilizers

• Afforestation

• Water harvesting

Which of these substances causes soil pollution when used in excess?

• Cow dung

• Compost

• Chemical pesticide

• Vegetable peel

How does overgrazing lead to soil erosion?

• By increasing soil nutrients

• By reducing plant cover that holds soil

• By attracting more rainfall

• By making soil hard and fertile

What would happen if soil organisms like earthworms disappear due to pollution?

• Soil fertility would improve

• Plants would grow faster

• Decomposition of organic matter would reduce

• Water would stay on the surface

Which method is best suited to prevent soil erosion on steep slopes?

• Crop rotation

• Contour ploughing

• Strip farming

• Chemical treatment

Which of these is a long-term effect of soil pollution?

• Increased food production

• Improved soil texture

• Loss of soil fertility and biodiversity

• Increase in groundwater