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 the scientific term for the top layer that covers most of the land?

• Clay

• Soil

• Dirt

• Sand

Which of the following is NOT a main component of soil?

• Air

• Water

• Plastic

• Minerals

How do animals like worms and insects contribute to soil?

• They make the soil harder

• They eat all the minerals

• They create tunnels that help air and water flow

• They remove water from the soil

What is the term for the nutrient-rich part of the soil that gives it a dark-brown color?

• Clay

• Rock

• Sand

• Humus

What is found beneath the topsoil layer?

• Water reservoirs

• Air pockets

• Solid rock

• More humus