IB ESS Unit 5 - Soil Systems and Society, top Exam Questions and answers, 100% Accurate.

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IB ESS Unit 5 - Soil Systems and Society, top Exam Questions and answers, 100% Accurate. soil - ✔✔-a complex ecosystem made up of minerals, organic material, gases and liquids which forms t... he habitat for many animals and plants translocation - ✔✔-when water carries particles either up or down in the soil, forming layers salinisation - ✔✔-when water evaporates from soil, leaving minerals behind. This occurs when Precipitation < Evaporation leaching - ✔✔-when water moves down through the soil, carrying dissolved minerals with it. This occurs when Precipitation > Evaporation O horizon - ✔✔-uppermost layer of newly added organic material A horizon - ✔✔-upper layer where humus builds up humus - ✔✔-when the decomposition of organic material is incomplete, forming layer of dark brown or black organic material B horizon - ✔✔-the layer where soluble minerals and organic matter are deposited from the layer above. In particular, clay and iron salts can be deposited here C horizon - ✔✔-a layer of mainly weathered rock from which [Show More]

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