## Now think why

[question] Question. Now think why — Tiruvananthapuram has equable climate? — Chennai has more rains only after the fury of monsoon is over in most parts of the country? — Jodhpur has a hot desert type of climate? — Leh has moderate precipitation almost throughout the year? — While in Delhi and Jodhpur most of the rain is confined to nearly three months, in Tiruvanantapuram and Shillong it is almost nine months of the year? In spite of these facts see carefully if there are strong evidences to c...

## Now find out:

[question] Question. Now find out: (i) Why are Tiruvanantapuram and Shillong rainier in June than in July? (ii) Why is July rainier in Mumbai than in Tiruvanantapuram? (iii) Why are south-west monsoons less rainy in Chennai? (iv) Why is Shillong rainier than Kolkata? (v) Why is Kolkata rainier in July than in June unlike Shillong which is rainier in June than in July? (vi) Why does Delhi receive more rain than Jodhpur? [/question] [solution] Solution: (i) The south-west monsoons hit Tiruvanantap...

[question] Question. (i) Name two rainiest stations. (ii) Name two driest stations. (iii) Two stations with most equable climate. (iv) Two stations with most extreme climate. (v) Two stations most influenced by the Arabian branch of southwest monsoons. (vi) Two stations most influenced by the Bay of Bengal branch of south-west monsoons. (vii) Two stations influenced by both branches of the south-west monsoons (viii) Two stations influenced by retreating and north-east monsoons. (ix) Two stations...

## Re-arrange the ten stations in two different sequences:

[question] Question. Re-arrange the ten stations in two different sequences: (i) According to their distance from the equator. (ii) According to their altitude above mean sea-level. [/question] [solution] Solution: (i) According to their distance from the equator: Tiruvanantapuram (closest) Bangalore Chennai Mumbai Nagpur Kolkata Shillong Jodhpur Delhi Leh (farthest) (ii) According to their altitude above mean sea-level: Kolkata (lowest) Chennai Mumbai Tiruvanatapuram Delhi Jodhpur Nagpur Bangal...

## Give the characteristics and effects of the monsoon rainfall in India.

[question] Question. Give the characteristics and effects of the monsoon rainfall in India. [/question] [solution] Solution: Characteristics of monsoon rainfall in India: (i) The duration of the monsoon is between 100 to 120 days from early June to mid-September. (ii) Around the time of its arrival, the normal rainfall increases suddenly and continues for several days. This is known as the ‘burst’ of the monsoon. (iii) The monsoon has characteristic wet and dry spells or ‘breaks’ in rainfall. Th...

## Give an account of weather conditions and characteristics of the cold season.

[question] Question. Give an account of weather conditions and characteristics of the cold season. [/question] [solution] Solution: The Cold Weather Season Beginning from mid-November, the winter season lasts till February. The weather is usually marked by clear sky, low temperatures and low humidity, and feeble and variable winds. The temperature decreases from the south to the north, with the peninsular region not showing any noticeable seasonal change in temperature pattern due to the moderat...

## Discuss the mechanism of monsoons.

[question] Question. Discuss the mechanism of monsoons. [/question] [solution] Solution: During summer, a low-pressure area develops over interior Asia as well as over north and north-western India. At the same time, there is a high-pressure system over the southern Indian Ocean. Winds move from a high-pressure area to a low-pressure area. As a result, the low-pressure system attracts the southeast trade winds of the southern hemisphere. On crossing the equator, these trade winds—due to the Cori...

## Describe the regional variations in the climatic conditions of India with the help of suitable examples.

[question] Question. Describe the regional variations in the climatic conditions of India with the help of suitable examples. [/question] [solution] Solution: Despite the overall unity accorded by the monsoon, there are visible regional variations in climatic conditions within India. Regardless of the moderating influences of the Himalayas in the north and the sea in the south, variations do exist in temperature, humidity and precipitation. For example, in summer, some parts of the Rajasthan des...

## Give reasons as to why.

[question] Question. Give reasons as to why. (i) Seasonal reversal of wind direction takes place over the Indian subcontinent? (ii) The bulk of rainfall in India is concentrated over a few months. (iii) The Tamil Nadu coast receives winter rainfall. (iv) The delta region of the eastern coast is frequently struck by cyclones. (v) Parts of Rajasthan, Gujarat and the leeward side of the Western Ghats are drought-prone. [/question] [solution] Solution: (i) The seasonal reversal of wind direction ove...

## Why does the rainfall decrease from the east to the west in Northern India?

[question] Question. Why does the rainfall decrease from the east to the west in Northern India? [/question] [solution] Solution: The amount of rainfall decreases from east to west in Northern India because of the progressive decrease in the humidity of the winds. As the moisture-bearing winds of the Bay of Bengal branch of the southwest monsoon move further and further inland, they exhaust most of the moisture they carry along with them. This consequently leads to a gradual decrease in the amou...

## Answer the following questions briefly.

[question] Question. Answer the following questions briefly. (i) What are the controls affecting the climate of India? (ii) Why does India have a monsoon type of climate? (iii) Which part of India does experience the highest diurnal range of temperature and why? (iv) Which winds account for rainfall along the Malabar Coast? (v) What are jet streams and how do they affect the climate of India? (vi) Define monsoons. What do you understand by “break” in monsoon? (vii) Why is the monsoon considered ...

## Choose the right answer from the four alternatives given below.

[question] Question. Choose the right answer from the four alternatives given below. (i) Which one of the following places receives the highest rainfall in the world? (a) Silchar (c) Cherrapunji (b) Mawsynram (d) Guwahati (ii) The wind blowing in the Northern Plains in the summers is known as (a) Kaal Baisakhi (c) Trade Winds (b) Loo (d) None of the above (iii) Which one of the following causes rainfall during winters in north-western part of India? (a) Cyclonic depression (c) Western disturbanc...