Class Notes NCERT Solutions for CBSE Students
Questions: Give reason for the following:
- Thiruvananthapuram has the year equable climate.
- Delhi has extreme climate.
- The Tamil Nadu coast receives winter rainfall.
- Leh has moderate precipitation almost through-out the year.
- The delta region of the eastern coast is frequently struck by cyclones.
Answer:
- It has equable climate due to proximity to sea. Sea has moderating influence over its climate.
- Because Delhi is far away from sea. As the distance from the sea increases,its moderating influence decreases.
- Tamil Nadu receives rainfall from North-east trade winds.
- Leh is at a very high altitude. During the cold weather season, the ‘Western Disturbances’ contribute to heavy snowfall in this region. Both south-west and south-east monsoons also cause precipitation in this part.
- (i) In the mid October, the mercury begins to fall at a rapid speed in Northern India.
(ii)The low pressure conditions of the North shifts to the Bay of the Godavari, the Krishna and the Kaveri.
Questions: Carefully study the given rainfall and temperature graphs and answer the following of questions:
1. Which station receives more rainfall?
Answer: Shillong.
2. Which is the rainiest month of Shillong?
Answer: June
3. Which is the coldest month in Leh?
Answer: January
4. Compare the climatic conditions of both the stations with reference to rainfall and temperature.
Answer:
- Leh receives very low rainfall whereas Shillong receives very high rainfall.
- Temperature in Leh remains very low throughout the year whereas temperature in Shillong remains between 10°C to 20°C Bengal by November. This shift causes cyclonic depressions in the Andaman Sea.
- These cyclonic depressions give rise to tropical cyclones which cause heavy and widespread rains in the deltas
Questions: Which moral values the monsoon teaches us? Mention any two.
Answer:
- Monsoon acts as a unifying bond.
- Monsoon are responsible for unity in diversity.
Questions: Why the people of India eagerly awaits the arrival of the monsoon?
Answer: These monsoon winds binds the whole country by providing water to set the agricultural activities in motion.
Questions: Compare he retreating monsoon with advancing monsoon.
Or
Mention any three features of retreating monsoon.
Or
Mention any four features of advancing monsoon.
Answer: Compare he retreating monsoon with advancing monsoon:
Advancing Monsoon:
Retreating monsoon:
Duration
The advancing monsoons prevail during the months of june, July, August and September.
The months of October and November are known for the retreating monsoons.
Pressure conditions
The low pressure conditions prevail over the north-western plains. By early June the trade winds of southern hemisphere are attracted towards this region.
During this season, the monsoon through of low pressure becomes weaker and is gradually replaced by high pressure.
Prevailing winds
The South-east trade winds prevail during this season. These are of oceanic origin. After crossing the equator these follow a south westerly direction. This is why they are known as the south-west monsoons.
Tropical cyclones and other local winds prevail during this period.
Questions: “Monsoon acts as a unifying bond”. Explain.
Answer:
- The seasonal alteration of the wind systems and the associated weather conditions provide a rhythmic cycle of seasons. Even the uncertainties of rain and uneven distribution are very much typical of the monsoons.
- The Indian landscape, its animal and plant life, its entire agricultural calendar arid the life of the people, including their festivities, revolve around this phenomenon. Year after year, people of India from north to south and from east to west, eagerly await the arrival of the monsoon.
- These monsoon winds bind the whole country by providing water to set the agricultural activities in motion. The river valleys which carry this water also unite as a single river valley unit.
