Summary
Makes the case that soil is far more than 'dirt' — it is a living system of minerals, organic matter, air, water, and billions of organisms that support almost all land-based life on Earth.
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Teaching resources
Discussion questions
Discussion
- What are the four main ingredients of soil?
- Why is soil considered a living system, not just a pile of ground-up rock?
- What happens to food production if topsoil is eroded away?
- How do decomposers connect back to soil health?
Quick work-a-long
Vocabulary: soil, topsoil, mineral, organic matter, decompose, humus, microorganism.
Try it: Collect a small cup of outdoor soil. Examine it with a hand lens and list everything you observe (texture, color, particles, living things). What percentage do you think is living?