Understanding Soil Erosion

Why is soil considered crucial for human survival?

• It is a source of minerals.

• It supports plant growth, which is the basis of our food supply.

• It is used for building houses.

• It is a natural water filter.

What is soil erosion?

• The compaction of soil layers.

• The loss of topsoil due to wind or water.

• The process of soil formation.

• The increase in soil fertility.

How do plant roots help in preventing soil erosion?

• By increasing soil temperature.

• By forming a fibrous mat that holds soil in place.

• By absorbing sunlight.

• By attracting earthworms.

What is one major consequence of removing plants from the soil?

• Enhanced soil moisture.

• Increased soil fertility.

• Improved plant growth.

• Rapid loss of topsoil.

What is a significant driver of increased soil erosion?

• Increased rainfall.

• Improved agricultural techniques.

• Growing human population and the need for more farmland.

• Decreasing human population.

Which agricultural practice can lead to severe soil erosion?

• Organic farming.

• Slash and burn agriculture.

• Crop rotation.

• Terracing.

What happens to land when topsoil is completely lost?

• It becomes a forest.

• It turns into a desert.

• It becomes more fertile.

• It supports more plant growth.

What is desertification?

• The process of soil becoming more fertile.

• The transformation of fertile land into desert.

• The growth of desert plants.

• The increase in rainfall in arid regions.

Which of the following is NOT a cause of desertification?

• Deforestation.

• Overgrazing by livestock.

• Extreme droughts.

• Planting more trees.

Why is it important to protect soil?

• It is abundant and does not need protection.

• It is essential for plant growth and food production.

• It is a renewable resource.

• It is not affected by human activities.