martes, 19 de octubre de 2010

Building up and Breaking down

This topic talks different thinks like types of mountains,the shape mountains have,what is weathering and erosion,and the ifferent types of orison,etc.

weathering and erosion:
-weathering is the breaking down of rocks by natural process
-erosion is the pick up and removal of rocks particles
weathering happens first than erosion.

Soil Horizon are the different leyers of soil from surface to the bedrock
They are:
                -horizon A:it is also call topsoil
                -horizon B:it is also call subsoil
                -horizonC:It is just the broken part of the bedrock

types of mountains:

-fold mountain

-fault-block mountain

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