Storms and Cyclones
Q1. Fill in the blanks.
Wind is moving air.
Winds are generated due to uneven heating
on the earth.
Near the earth’s surface warm air
rises up whereas cooler air comes down.
Air moves from a region of high
pressure to a region of low pressure.
Air expands on heating.
Warm air is lighter than the cold
In summer the winds flow from the land
towards the ocean. False
In winter the winds flow from the land to
the ocean. True
A cyclone is formed by a very high-pressure
system with very high-speed winds revolving around it. False
The coastline of India is not vulnerable to
Increased wind speed is accompanied by a
reduced air pressure. True
Regions close to the equator get maximum
heat from the Sun. True
Q3. Which one of the following place is unlikely to be affected
by a cyclone?
(i) Chennai (ii)
Mangaluru (Mangalore) (iii) Amritsar (iv) Puri
Q4. What is wind?
The moving air is called wind.
Q5. What is anemometer?
The instrument that measures the wind speed is called an anemometer.
Q6. When you fly a kite, does the wind coming from your back
Yes, the force of the wind pushes the kite upwards and backwards.
Q7. Does the water give back heat when vapour condenses into
Yes, the water gives back heat when vapour condenses into liquid.
Q8. What is the main cause of wind movement?
heating on the earth is the main cause of wind movements.
Q9. Why we fill air into the bicycle tube?
We have to fill air into the bicycle tube to keep it tight.
Q10. Where do thunderstorms usually develop?
Thunderstorms develop in hot, humid tropical areas like India very frequently.
Q11. What do tornadoes look like?
Tornadoes can appear as a traditional funnel shape, or in a slender rope-like
Q12. From where does the word monsoon derived? What does it mean?
The word monsoon is derived from the Arabic word ‘mausam’, which means ‘season’.
Q13. What is the direction wind in winter?
In winter, the direction of the wind flow gets reversed; it flows from the land
to the ocean.
Q14. What are the factors that contribute to the development of
Factors like wind speed, wind direction, temperature and humidity contribute to
the development of cyclones.
Q15. What role does the wind play in the formation of storm?
All storms are low pressure systems. Thus, wind speed plays an important role
in the formation of storms.
Q16. Why do the leaves of trees, flags and banners flutter when
the wind is blowing?
It is due to the pressure exerted by moving air (or wind) that the leaves of
trees, flags and banners flutter when the wind is blowing.
Q17. Is it difficult to ride a bicycle against the direction of
the wind? Why?
Yes, it difficult to ride a bicycle against the direction of the wind as air
exerts pressure in the opposite direction in which bicycle is moving.
Q18. How can cyclones be predicted?
Meteorologists around the world use modern technology such as satellites,
weather radars and computers etc. to track tropical cyclones as they develop.