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Subsoil: Quiz

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Question 1: is the layer of ________ under the topsoil on the surface of the ground.
SoilWater wellClayLandslide

Question 2: The subsoil may include substances such as clay and/or sand that has only been partially broken down by ________, sunlight, water,wind etc., to produce true soil.
Atmosphere of EarthEarthNatureHistory of the Earth







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