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Soil

Science, Grade 3

 
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© Copyright NewPath Learning. All Rights Reserved. 94-4348 Visit www.newpathlearning.com for Online Learning Resources. Soil Photo courtesy of ARS. What is Soil? Soil covers most of Earth’s land. It is a mixture of sediments of weathered rocks, nonliving materials, and decayed plants and animals. soil (sand, silt, clay, decayed materials) soil (sand, silt, clay, decayed materials) Soil profile topsoil with humus subsoil- weathered rock bedrock- solid rock Soil Layers Over time, three layers of soil develop. Topsoil is made mostly of decaying plant and animal remains (humus). Subsoil contains minerals and small rocks. Bedrock is mostly solid rock.
© Copyright NewPath Learning. All Rights Reserved. 94-4348 Visit www.newpathlearning.com for Online Learning Resources. Soil Pause & Review Label the soil profile. Describe what each layer is made of. ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ Why do you think soil is important? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________