Condensation and Precipitation
Condensation and Precipitation
Condensation and Precipitation:
Air always contains some amount of water vapour at a given temperature. When the temperature of air decreases, the capacity of air to hold water vapour also decreases, and vice versa. When the temperature of air falls below a certain temperature, the excess water vapour present in the air gets transformed into very small droplets of water. This process is called condensation and the temperature at which condensation takes place is called the dew point. For condensation to take place a surface is required. Such a surface is called the nucleus. Tree leaves, grass and dust particles in air are examples of nucleii around which condensation occurs. Condensation of water vapour leads to the formation of clouds, rain, snow, sleet and hailstone.
Clouds and Rain:
During the day, when water bodies (oceans, lakes, ponds, etc.) are heated up by the sun, a large amount of water goes into air as water vapour.
Which of the following are correct : (a) During the day, when water bodies are heated up by the sun, a large amount of water goes into air as water vapour. (b) When the temperature falls below the dew point, the excess water present in the air gets condensed around the dust particles, forming tiny droplets of water. (c) Condensation of water vapour leads to the formation of clouds, rain, snow, sleet and hailstone. | |||
| Right Option : D | |||
| View Explanation | |||
The temperature at which condensation takes place is called the _________________________. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) When the temperature of air decreases, the capacity of air to hold water vapour also decreases. (b) When the temperature of air increases, the capacity of air to hold water vapour also increases. | |||
| Right Option : C | |||
| View Explanation | |||
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