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Sia ? 3 years, 5 months ago
| Evaporation | Condensation |
| By definition, evaporation is a process where water changes into vapour. | Condensation is the opposite process where water vapour is converted to tiny droplets of water. |
| Evaporation occurs before a liquid reaches its boiling point. | Condensation is a phase change regardless of the temperature. |
| In terms of molecular movement, when a liquid is heated or when pressure is decreased the forces of attraction between molecules is low. The liquid then evaporates to a gas. | When a gas is cooled or when the pressure is increased the forces of attraction between molecules become strong. The gas then condenses to either a liquid or even a solid. |
| Evaporation can occur in all surfaces, at all times and at all places. Evaporation is frequent when the air is dry, hot and windy. | Condensation takes place on salt, hygroscopic nuclei-pollen grains, carbon particles etc.when air temperature is decreased beyond the level of saturation. |
| Evaporation usually takes place in low altitudes. | Condensation happens mainly at higher altitudes. |
| When evaporation takes place energy is consumed. | In the process of condensation energy is released. |
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Sia ? 3 years, 5 months ago
- The forest area is the area notified and recorded as forest land irrespective of the existence of trees, while the actual forest cover is the area actually occupied by forests.
- The forest area is based on the records of State Revenue Department.
- The forest cover is based on areal photographs and satellite imageries. In 2001, the actual forest cover was only 20.55%.
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