What’s the Dirt on... Dirt?

The video explores the concept of dirt, emphasizing its importance to life on Earth. It explains that what we commonly call dirt is scientifically known as soil, a mixture of minerals, water, air, and organic matter. The video details how soil varies in composition depending on location and highlights the role of air and water in supporting life within the soil. Organic matter, including living and decomposed organisms, enriches the soil with nutrients, forming humus. The video also describes the layered structure of soil, from organic-rich topsoil to mineral-heavy deeper layers, ending with solid rock.

What is organic matter and why is it important for soil?

Describe the layers of soil and their characteristics.