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Soil and Glaciers

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University of Phoenix Material

Soil and Glaciers Worksheet

From Visualizing Earth Science, by Merali, Z., and Skinner, B. J, 2009, Hoboken, NJ: Wiley. Copyright 2009 by Wiley. Adapted with permission.

Part 1

Size grades of soil are named sand, silt, and clay, which includes colloids. Size grades are defined using the metric system. Use Figure 4.8 from the textbook to fill in the following chart. Specify the type and size and description of the particle. In some cases, particle size will be less than some value or greater than another value. For instance, gravel is greater than 2.0 mm.

|Name |Size |Description |
|Gravel |>2.0 mm |Gravel is very small, irregular pieces of rock and stone. Gravel is more rough and rocky than sand, and |
| | |smaller than stones. The word gravel comes from the French word gravele, "gravel or sand," which in turn |
| | |comes from grave, "seashore or sand ("Gravel ", 2015). |
|Sand |0.05 |sedimentary material, finer than a granule and coarser than silt, with grains between 0.06 and 2.0 |
| | |millimeters in diameter ("Sand", 2003-2015). |
|Silt |0.0002 |Silt is very fine sediment that is formed by the process of erosion. It is usually found in or near bodies |
| | |of water or where bodies of water once existed. It is often extremely fertile and an aid to human |
| | |agriculture ("What Is Silt?", 2003-2015). |

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