POWER POINT PRESENTATION

Submitted by,Shibina Beegum N.R.

Social ScienceDate: 4/08/2015 Tuesday

WELCOME

WEATHERINGDisintegration or

decomposition of rocks is known as

Weathering.

TYPES OF WEATHERING

Physical / Mechanical Weathering Chemical Weathering. Biological Weathering.

PHYSICAL / MECHANICAL WEATHERING

The expansion and contraction of minerals due to the variations in temperature results in physical / Mechanical weathering.

CHEMICAL WEATHERING

Oxygen, Carbon dioxide, Water etc….react with the minerals and result in the Chemical de composition of rocks

BIOLOGICAL

WEATHERINGThe plant roots penetrating into the fissures in rocks, burrowing of animals and the decomposition of plant and animal remains leads to biological weathering.

WEATHERING AND HUMANS

Human activities that lead to weathering of rocks.

Quarriying Mining

Constructive works Deforestation

WEATHERING HELPS HUMANS

IN MANY WAYS Minerals in rocks get extracted. Helps in mining. Causes soil formation.

THANK YOU