Soil Composition and Its Importance in the Ecosystem Quiz

What is the primary role of soil in an ecosystem?

• Support plant growth
• Store water
• Provide shelter for animals
• Filter air

Which component of soil is primarily responsible for providing essential nutrients to plants?

• Water
• Air
• Minerals
• Organic Matter

What is the O Horizon in soil layers primarily composed of?

• Weathered rock
• Decomposed organic material
• Minerals
• Air pockets

Which type of weathering involves the breakdown of rocks by physical forces?

• Chemical Weathering
• Biological Weathering
• Physical Weathering
• Organic Weathering

How does soil contribute to water filtration?

• By absorbing all water
• By purifying and filtering water
• By preventing water loss
• By storing excess water

What is the ideal soil texture for most plants?

• Sandy Soil
• Clay Soil
• Loamy Soil
• Rocky Soil

Which soil horizon is known as the subsoil where minerals accumulate?

• O Horizon
• A Horizon
• B Horizon
• C Horizon

What effect does organic matter have on soil?

• Decreases water retention
• Improves soil structure
• Increases soil acidity
• Reduces nutrient availability

Why is soil considered a carbon sink?

• It releases carbon dioxide
• It stores carbon dioxide
• It absorbs sunlight
• It prevents erosion

Which soil type retains water but may become compacted?

• Sandy Soil
• Clay Soil
• Loamy Soil
• Gravelly Soil