Soil, Dirt...

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theme: Dirt ... Step-by-Step
Dirt is made from rocks, plants, and animals which have broken down into smaller pieces with time and weather. Sand is made only from rocks (or shells) which have broken down into tiny pieces. Another name for dirt is soil. Mud is wet dirt. Dirt varies in texture and color. It can have a tint of red, yellow, blue, brown or black. Underground dirt is the home to many animals and insects. Some of these are the worm, ant, and mole. People sometimes use dirt for their homes. Mud mixed with grass and straw, and then baked, is called adobe. Bricks are made in a similar way. Plants need dirt in which to grow. (taken from the website)
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(includes book list, songs, poems, art, activities, recipes (make 'dirt' from chocolate pudding & Oreos)
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theme: Soil ... 42 Explore
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theme: The Dirt on Soil...What's Really Going on Underground ... Discovery Education
dirt_on_soil...DE.JPG
  • Down & Dirty ... explore the many layers of soil
  • Field Guide ... there's something alive under your feet
  • Soil Safari ... micro-size yourself for this journey underground ... a very interesting interactive activity
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soil layers ... Enchanted Learning
"Soil is made up of distinct horizontal layers; these layers are called horizons. They range from rich, organic upper layers (humus and topsoil) to underlying rocky layers (subsoil, regolith and bedrock). (taken from website)
soil_layers...enchanted_learning.gifsoil_layers_--_printout.gif
See the website for a description of each of these layers & this 'label' activity..label the soil layers
  • Layers:
    • O -- leaf litter and humus (decomposed organic matter)
    • A -- humus and minerals (seeds germinate & plant roots grow in this layer)
    • E -- sand and silt
    • B -- clay and minerals (iron, aluminum, calcium carbonate)
    • C -- slightly broken up rock (bedrock from the next lower layer)
    • R -- unweathered rock (bedrock)
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soil layers ... Discovery Education
soil_layers...discoveryed.jpg...see the website for a description of each layer
  • layers:
    • ground level -- plants grow and animals live here; decomposers recycle dead plants & animals into humus
    • topsoil -- plants grow and animals live on top of the soil; "organic" layer; decomposers recycle dead plants & animals into humus
    • subsoil -- mixture of minerals & humus near the top; most of the soil's nutrients are found here; deep plant roots come here looking for water; clays & minerals often stick here as water drains down
    • weathered parent material -- very deep layer; no organic matter; rock particles, full of minerals
    • bedrock -- solid rock (formed before the soil above it
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