domingo, 26 de septiembre de 2010

VOCABULARY Nº15

Fold mountain: a moountain made mostly of rock layers.








Fault-block mountain: a mountain made by huge titled.





Weathering: the breaking down of rock.





Erosion: the picking up.





Soil: a mixture of weathered rock.





Soil horizont: any of the layers of soil.





Groundwater: water that soaks into soil and rock.





Humus: material in soil.


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