When a small amount of garden soil is put into a glass jar containing water, stirred and allowed to stand for two hours, the layers from top to bottom would be:

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Debris, water, sand and clay

Humus, water,clay and sand

Debris, clay, gravel and sand

Humus, clay,gravel and sand

answer is B.

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Detailed Solution

Concept: Soil discusses spaces and natural matter, but for the most part, mineral particles. There are three sorts of soil minerals, sand, residue and clay.
The relative rate of each particle within the soil decides its surface. Sand has the biggest soil particles (0.4- to 0.01-inch breadth) and the biggest pores between particles.
Sediment soil molecule measure is between clay and sand (0.01- to 0.0001-inch breadth). Silty soil's characteristics are comparable to clay but are directed by its bigger molecule measure. Clay soil has the littlest soil particles (less than 0.0001-inch breadth) and the slightest sum of water and discusses spaces between particles. Humus is a dim, natural fabric that shapes in soil when plant and creature matter rots.
Hence, the correct answer is option 2.

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