1
Published in 2015
Where is the water in soil? Solids, liquids, and gases, the three phases of matter, are always present in soil. Small mineral and organic particles compromise the solid fraction, and there are spaces (pores) between the solid particles. Some pores are large, and others are very small. Air and water,...
Grade Level   9 10 11 12
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2
Published in 2014
Interconnected , this described the nutrient cycles; the conversions, transformations, and movement of nutrients through the soil, abiotic and biotic components of the environment. This activity uses a qualitative nitrate to observe results of some conversions and transformations in the nitrogen...
Grade Level   9 10 11 12
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3
Published in 2016
Compaction of soil can contribute to size and numbers of pores. Soil can become compacted many ways, and this can have long-term effects. For example, when American settlers traveled the Oregon Trail in their wagons in the 1800s, soil became so compacted that we still can see wheel ruts today. Try...
Grade Level   5 6 7 8 9 10
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4
Published in 2013
The key properties of soil (physical, biological, and chemical) determine recreation, crop production, range, water/erosion conservation, forestry, and engineering uses of the soil. Soil surveys help us understand how soils differ and how they behave under various land management systems. The heart...
Grade Level   5 6 7 8 9 10 11 12
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5
We walk around on soil all the time, but how often do we think about what's in it? If you have ever looked closely at soil, you probably saw that it is made up of various types of particles and has various materials mixed in with those particles (rocks, twigs, water, air, worms, insects, and much...
Grade Level   5 6 7 8 9
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6
Are soils like M&Msâ„¢? Yes! Typical soil colors are red, brown, yellow, or black. These colors are often not the color of the minerals in the soil but coatings of iron oxides (Fe203, FeOOH, and so on) or organic matter on particles. The minerals beneath are often quartz or feldspar, which are...
Grade Level   9 10 11 12
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