State two differences between rocks and sand
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A rock is a more-or-less hard aggregation of mineral or mineraloid grains. Sand is a size class. Geologists most frequently use the Wentworth Grade Scale. In this grade scale, sand is the name applied to particles that are between 1/16th (0.0625) and 2 millimeters.
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Sand, Silt and Clay. These particles are basically small sized particles (all less than 2mm) which are formed by weathering and specific soil forming (pedogenic) processes. Whereas Rocks are relatively larger in size. ... Soil is powdery whereas rocks are bulky.
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