Unveiling The Secrets Of Soil And Its Vital Role In Our Ecosystem

The video explores soil as a vital living organism, detailing its composition, formation, and layers. It includes an experiment to analyze soil samples, demonstrating the different components like sand, silt, and clay. The video also explains how soil is formed through weathering and the role of living organisms. Finally, it examines soil layers, highlighting the organic layer, topsoil, subsoil, parent material, and bedrock.

What percentage of the planet's biodiversity is found in soil organisms?

• 10%

• 25%

• 50%

• 75%

Which component of soil is the largest by volume?

• Minerals

• Organic material

• Water

• Air

In the soil experiment, which layer settles at the bottom of the container?

• Organic material

• Sand

• Silt

• Clay

What is the primary role of earthworms in soil?

• Breaking down organic material

• Absorbing water

• Aerating and improving soil

• Binding soil particles

How is soil primarily formed from rocks?

• Through animal activity

• Via human intervention

• By weathering processes

• Through volcanic activity

What is the role of water in soil formation?

• It compacts the soil

• It prevents erosion

• It absorbs minerals and forms soil water

• It evaporates quickly

Which soil layer is known as the 'O Horizon'?

• Bedrock

• Organic layer

• Subsoil

• Topsoil

What is found in the B Horizon of soil?

• Plant roots

• Unbroken rock

• Leached minerals

• Humus

Which layer of soil contains partially broken rock?

• C Horizon

• A Horizon

• O Horizon

• R Horizon

What factors influence the formation and composition of soil profiles?

• Human construction

• Animal activity

• Climate and vegetation

• Water pollution