Within our soil layer, reactions between solid rock, liquid Even though it is actually only a very thin layer on Earth's surface over the solid rocks below, it is the place where our atmosphere, hydrosphere, biosphere and the rocks of the Earth meet. We get wood, paper, cotton, medicines and even pure water from soil. It is unlikely that humans would have been able to live on Earth without soil! Your life and the lives of many organisms depend on soil. Thank goodness for mechanical and chemical weathering, because without these forces working to breakdown rock we would not have any soil on Earth.
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