Explore Sand Silt and Clay - National Wildlife Federation - 1 views
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Ashley Stewart on 11 Feb 121.2.1 "Observe and compare properties of sand, clay, silt and organic matter. Look for evidence of sand, clay, silt and organic matter as components of soil samples." This activity can be modified for gifted students by having them record their predictions about which particles will sink and which particles will float, rather than solely making the observations. This activity can also be modified for older grades by having them do the same thing. The older students can also be told to gather material that is sand, silt, and clay, and try to keep these in separate jars.
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Students gather dirt samples from different outdoor areas and fill a jar with their dirt samples. The teacher will add water until the jar is two-thirds full and the students will take turns shaking their jar for two minutes. Each group will allow the contents in their jar to settle for fifteen to thirty minutes. Have the students make observations about how the dirt settled. The heaviest pieces of soil will settle first. Have the students identify the different-sized particles.
