Name the different factors which influence the weathering process.
Answers
ANSWER :
There are two factors that play inweathering, viz. Temperature and Precipitation. Warm climates affect by chemical weathering while cold climates affect by physical weathering(particularly by frost action). In either case the weathering is more pronounced with more moisture content.
Answer:
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Explanation:
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Factor # 1. Climate:
This is the most important factor affecting weathering of rocks. The extent of weathering is dependent on the average atmospheric condition prevailing in a region over a long period of time.
There are two factors that play in weathering, viz. Temperature and Precipitation. Warm climates affect by chemical weathering while cold climates affect by physical weathering (particularly by frost action). In either case the weathering is more pronounced with more moisture content.
Factor # 2. Particle Size:
Rate of chemical weathering is affected by size of rock particles. If the rock pieces are smaller, the weathering is faster. This is because if the rock pieces are smaller, the surface area exposed to weather action is greater.
Factor # 3. Exposure:
The extent of exposure i.e. the extent to which the rock comes into contact with the agents of weather is an important factor affecting the weathering. In some situations, vegetation, soil, ice, etc. may cover a rock, thereby reducing the area exposed to weather action.
Such rocks so protected weather slowly compared to rocks whose surfaces are wholly exposed to weather. Slope of the region is also a factor affecting weathering. Where the slopes are steep, loose materials are displaced downhill either by gravity or by erosion resulting in continuous exposure of the fresh rock.
Factor # 4. Mineral Composition:
We know, the chemical properties of a rock depend on the mineral composition to a great extent. Mineral in a rock may readily react with acids, water or oxygen causing considerable weathering. For example limestone can get severely acted upon by even very mildly acidic rainwater. Granite on the contrary mostly containing silica remains unaffected by such agents.
Physical weathering is also dependent on mineral composition. Rocks which are soft are liable to be abraded more readily than hard rocks. The solid crystalline rocks are quite compact with very little opening and are very resistive to entry of water into them, and can therefore resist weathering.
Factor # 5. Time:
The process of weathering is a time taking process. The duration of time for which a rock is exposed to weather determines the extent of weathering. Very strong rocks, however strong they might be will severely undergo weathering in hundreds of years.
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