PLS 2- Chapter #15- Soils and the Environment

What is the role of soil in ecosystem services?

• It has no significant role.

• It is only responsible for water filtration.

• It only supports plant growth.

• It acts as a link between air, water, rocks, and organisms.

How does soil contribute to air quality?

• By absorbing all pollutants.

• By releasing harmful gases.

• By increasing the amount of dust in the air.

• By preventing erosion and reducing dust particles.

What happens to soil temperature in colder regions?

• It only affects plant growth.

• It has no effect on biological and chemical reactions.

• It decreases biological and chemical reactions.

• It increases biological and chemical reactions.

What is the significance of carbon stored in soil?

• It is only important for plant growth.

• It has no impact on the environment.

• It is nearly 5 times more than the carbon stored in plants.

• It is less than the carbon stored in plants.

How does soil act as a water filter?

• By absorbing all water and not releasing it.

• By allowing all water to pass through without any filtration.

• By capturing contaminants and cleaning the water.

• By only filtering rainwater.

What can result from the application of excess fertilizers?

• Improved water quality.

• Runoff to streams and rivers or contamination of groundwater.

• No effect on water systems.

• Increased plant growth without any side effects.

What role does soil play in waste decomposition?

• It converts waste products into new materials.

• It has no role in waste decomposition.

• It stores waste products indefinitely.

• It only decomposes plant waste.

How does soil affect military operations in desert regions?

• By providing a clear view for all vehicles.

• By creating dust clouds that can hide armies and tanks.

• By reducing the amount of dust in the air.

• By increasing the lifespan of tank engines.

What is the impact of excess phosphate in freshwater systems?

• It stimulates the growth of photosynthetic organisms, blocking light and consuming oxygen.

• It has no impact on the ecosystem.

• It only affects fish populations.

• It improves water clarity.

What is the function of soil in habitat creation?

• It only supports animal habitats.

• It only provides water to plants.

• It provides heat, nutrients, and water for plant growth, forming ecosystems.

• It has no role in habitat creation.