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Question Question 4
Differentiate the following.
(a) Chemical weathering and Mechanical weathering.
(b) Linear scale and Verbal Scale.
(c) Agro-based and Mineral based industry.
(a) Difference between chemical and mechanical weathering:
| Chemical weathering | Mechanical weathering |
|---|---|
| It involves the breaking down of rocks by altering or dissolving the rock minerals due to chemical action or changes | It is responsible for the disintegration of rocks by the elements of weather such as heat, frost and wind. |
| The processes involved in chemical weathering are Oxidation, Carbonation, Hydration and Solution. | The processes involved in mechanical weathering are Exfoliation, Granular disintegration and Block disintegration. |
| Chemical weathering is slow as compared to mechanical weathering. | Mechanical weathering is comparatively faster. |
(b) Difference between linear scale and verbal scale:
| Linear scale | Verbal scale |
|---|---|
| This scale represents the relationship between the distance on the map and distance on the ground. | In this method the scale is expressed in words, e.g., 1 cm on the map represents 50 km on the ground. |
| It is the most accurate method of measuring distance on the map. | It does not give the accurate measurement. |
(c) Difference between Agro-based and Mineral based industry:
| Agro-based industries | Mineral-based industries |
|---|---|
| Agro-based industries depend on agriculture for supply of their raw materials. | Mineral-based industries receive their raw materials from minerals. |
| E.g. Sugar industry, Textile industry. | E.g. Iron and Steel industry, Cement industry. |