¿Qué es el suelo?

The video explains soil as a mixture of stones, water, and microorganisms. It details the formation of soil from weathered rocks and organic matter, highlighting the role of humus in soil structure and fertility. The video also describes the different layers of soil, including topsoil, subsoil, and bedrock, and how bedrock fragments over time to form soil, creating habitats for various organisms.

What is soil primarily composed of?

• Only air and water

• A mixture of stones, water, and dead plants

• Just microorganisms

• Only stones and water

How do microorganisms contribute to soil health?

• They make the soil dry

• They decompose organic matter into humus

• They remove oxygen from the soil

• They prevent plant roots from growing

What is the main function of humus in the soil?

• To help soil bind together and retain water

• To make the soil sandy

• To increase the amount of stones in the soil

• To remove minerals from the soil

Which layer of soil is most abundant in humus?

• Subsoil

• Weathered rock

• Bedrock

• Topsoil

What is the role of bedrock in soil formation?

• It prevents soil formation

• It is the topmost layer of soil

• It is made entirely of humus

• It fragments over time to form soil above