Soil Erosion Quiz

What is soil erosion?

• The accumulation of soil on a surface

• The wearing away of the topmost layer of soil

• The process of soil formation

• The increase in soil fertility

Why is the topmost layer of soil important?

• It is the deepest layer

• It is the hardest layer

• It is the most fertile and contains most organic matter

• It contains the least organic matter

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

• Building houses

• Using organic fertilizers

• Deforestation

• Planting more trees

How does water contribute to soil erosion?

• By increasing soil fertility

• By washing away the topsoil during rain and floods

• By making the soil more compact

• By reducing soil nutrients

What role does wind play in soil erosion?

• It helps in soil formation

• It increases soil moisture

• It blows away the topmost layer of sandy and loose soil

• It compacts the soil

How can chemicals lead to soil erosion?

• By making the soil more fertile

• By increasing soil moisture

• By loosening the soil and causing it to wash away

• By compacting the soil

What is afforestation?

• Using chemical fertilizers

• Cutting down trees

• Planting trees to prevent soil erosion

• Building dams

What is terrace farming?

• A method of planting trees in rows

• A method of using chemicals to prevent erosion

• A method of building walls along riverbanks

• A method of cutting slopes into steps to reduce water runoff

How do check dams help in preventing soil erosion?

• By speeding up water flow

• By slowing down water flow and reducing erosion

• By increasing soil fertility

• By compacting the soil

What is the purpose of using trees as windbreakers?

• To increase wind speed

• To increase soil moisture

• To slow down wind and prevent soil erosion

• To compact the soil