Advertisements
Advertisements
प्रश्न
Describe the various types of clouds.
उत्तर
The four types of clouds are :
- Cirrus clouds - These are feathery, fibrous clouds which form at very high levels of 5 to 10 km. They consist of tiny crystals of ice and look like wisps of cotton floating in the sky.
- Cumulus clouds - These are cauliflower-shaped clouds that have great vertical height and a flat base; they cause rainfall with lightning and thunder and are usually white or grey in colour.
- Stratus clouds - These are sheet-like clouds that spread out over the whole sky. They usually form at low levels, less than 2 km. They are uniformly grey and dull.
- Nimbus clouds - These are the real rain clouds – thick, dark and black, and spread out in layers. They cause continuous rain or snow.
APPEARS IN
संबंधित प्रश्न
Fill in the blanks
The pressure difference causes horizontal movement of air called _____ and vertical movement of air called ____.
Fill in the blank:
Planetary winds are also called permanent or _________winds.
What do you understand by the term ‘4 o’clock showers’?
With the help of your atlas, encyclopedias, and the Internet, find out about the climate of these places.
- Mumbai
- Delhi
- Kolkata
- London
- New York
- Sydney
In your notebook, draw neat, labelled, coloured sketches of the three different types of rainfall. Alongside each diagram, briefly describe in your own words, how each type of rainfall occurs.
What is relative humidity? How does it differ from absolute humidity?
How is the weather forecast made? Why is weather forecast necessary?
This could be a classroom activity. If your school laboratory has an anemometer, use it to record your city’s wind speed for a week. Use the Beaufort Scale to find out the character of wind during these days. Record your observations carefully in your notebook. You could even draw small neat sketches to show the effect of the wind.
What are the elements of weather?
What effects do nearness to the sea and height above mean sea level have on the climate?