Mechanical weathering
by: Jane T.
Process of physical disintegration and
chemical decomposition of solid rock materials at or near the earths
surface. Mechanical weathering is breaking big rocks into little
ones. This ussually happens around the surface of the planet.
temperature effects the land too. the cool nights and hot days always
cause things to expand and contract. roots and plants also push into the
rocks apart. mechanical weathering is called FREEZE- THAW.
Mechanical weathering is also called SALT- WEDGING.
http://encarta.msn.com/find/MediaMax.asp?pg=3&ti=761555067&idx=461533582
I got this picture on the Encarta Encyclopedia
