ppt weathering

part of b.ed course

1. WELCOME

2. Our earth is made up rocks. Rocks are composed minerals. Our earth itself is changing. I.e., rocks are getting changed. Introduction

3. The process of disintegration and decomposition of rock in generally called weathering . Weathering

4. Composition and structure of rock Nature of ground slope Climatic variations Floral effects Controlling factors of weathering

5. Wind Glacier Running water Sea waves under ground water Agents of weathering

6. Physical weathering Chemical weathering Biological weathering There are three types of weathering

7. Also known as mechanical weathering. It is caused by the change temperature. Due to expansion and contraction rocks break up. Physical weathering

8. Physical weathering happen due to the process of, Changing of temperature Freezing action of water Roots growing plants which disintegrate rocks

9. PHYSICAL WEATHERING

10. Decomposition and disintegration of rocks due to chemical reaction. Water causing a change in the chemical composition of rocks. Chemical weathering

11. CHEMICAL WEATHERING

12. 1. Solution It is refers to the dissolution of soluble particles and minerals from the rocks. 2. Oxidation It is a reaction of atmospheric oxygen to from oxides. 3. Carbonation It is a reaction of carbonate or bicarbonate ions with minerals. 4. Hydration The process of hydration is related to the addition of water to the minerals. Types of chemical weathering

13. Hydaration Carbonation Oxidation

14. The action of plants and animals leads to breaking of rocks. Roots causing disintegration of rocks. The roots of the trees penetrate into the cracks of the rocks. Biological weathering

15. BIOLOGICAL WEATHERING

16. Types of biological weathering Burrowing animals Quarrying By human excreta

17. Weathering leads to soil formation. There are three types ,physical ,chemical ,biological weathering. Topography ,climate , characteristic of rocks etc .. Influence weathering . Conclusion