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By Katie Sharpe

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F the water drains through the soil from your yard quickly, it probably has a lot of sand in it. f the soil drains very little or not at all, it probably has a lot of clay particles in it. f it drains slowly, it may have a mixture of sand, silt, and clay particles. Gardening soil is made to drain water slowly so that plants can grow well in it. t has a combination of all three particles in it. W O Chapter Three age 16 hen you pour water over the soil on a flat surface, you may notice the water splashes on the soil.

Indd 1 21 st Centur y Content You study reading, math, science, and social studies. You also need to learn about the world of work and your community. These notes tell you about business and money. They also give you ideas about how you can help yourself, your community, and the world. Life & Career Skills These notes tell you about skills you will use throughout your life. They give you ideas about how to work well with others, make good decisions, and achieve your goals in life.

Get the Inside Scoop. Madison, gronomy, 2008. R eights, N T P Gardner, obert. Super Science Projects About Earth’s Soil and Water. Berkeley J: nslow, 2005. A eb Sites W Dig It! edu/soils/ his site, sponsored by the Smithsonian nstitution, allows visitors to interact with a live soil exhibit. html his site offers everything you need to know about the soil beneath your feet. gov/gallery/state_soils/ I V isit this site to find out if your state has established a state soil. f it has, what is it? c sc R eal World ien e: Soil 31 frica, 22 air, 13 mazon rain forest, 26 animals, 4, 7 limestone, 14–15 loam, 16 Mars, 11 microorganisms, 27 minerals, 5 bacteria, 8, 13 bedrock, 17 calcium, 5 charcoal, 26–27 clay particles, 16 compost, 27 crop rotation, 25–26 nitrogen, 5 nutrients, 5–6, 13 deserts, 21, 22 dinosaur fossils, 5 drought, 22 parent material, 10, 14 particles, 10, 15–16 plants, 4–7 potassium, 5 organisms, 8 oxygen, 4, 6–7 terra preta, 26–27 terraces, 24–25 topsoil, 17, 20 tree roots, 12 trees, 21–22, 25, 28 eal orld Science Challenge, 6, 13, 16, 18, 20, 28 recycling, 27–28 W R earthworms, 13 erosion, 11–12, 19–23 farming, 22–26 fossils, 5 fungi, 8, 13 nutrients in, 5–6, 13 organisms in, 8 properties, 14–18 types of, 9, 18 soil erosion prevention, 24–28 process of, 19–23 soil formation, 9–13 soil layers, 17, 18 soil profile, 17 soil scientists, 26 subsoil, 17 sun, 11 sand particles, 15 sandstone, 15 seeds, 5 silt particles, 15–16 soil composition of, 9–13 importance of, 4–5 Grand Canyon, 20 horizons, 17 humans, 4, 7, 21 humus, 12–13, 17, 26 ice, 11 insects, 8 enus, 11 vitamins, 5 water, 5–6, 13 water erosion, 11, 12, 20 wind erosion, 12, 20, 21 windbreaks, 25 V A A Index About the Author Katie Sharp has written several books for children.

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