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Discovery Education
Discovery Education: The Dirt on Soil
This interactive website explores the various soil layers and introduces you to the lifeforms that live in those soil layers.
Science Buddies
Science Buddies: Get Down and Dirty: How Does Soil Change With Depth?
What covers less than 10% of the Earth's surface, yet is a vital natural resource for terrestrial life? What filters ground water and supports most of our food production, not to mention the production of building materials and paper?...