Soil, Silt, and Sand: Layers of the Underground

Jody Rake

2017年8月 · Capstone Press · 讲述者：Various Narrators

关于此有声读物

There’s more than just dirt below! Readers will learn about the layers and types of soil underground. Rocks, clay, sand, silt and all nonliving things underground are explored. Earth's core, mantle, and crust are also discussed. Readers will also discover why we could not live without dirt, and why we need to protect it.