Wind - Formation and Importance - UNSOLVED PRACTICE SET
Chapter: Natural Resources | Topic: Wind Formation and Importance
WIND - FORMATION AND IMPORTANCE - UNSOLVED PRACTICE SET
Topic: Wind Formation and Importance
Multiple Choice Questions
Q1. Wind is basically:
- Water moving in the air
- Air moving from an area of high pressure to an area of low pressure
- Clouds moving fast
- Dust particles flying
Q2. During the day, wind generally blows from the sea towards the land because:
- The sea is cooler than the land during the day
- The land heats up faster than the sea, creating low pressure over land
- The sea pushes air towards the land
- The wind likes the land more
Q3. At night, the wind direction near the coast reverses and blows from land to sea because:
- The land cools down faster than the sea, creating high pressure over land
- The sea becomes hotter than the land
- The moon pulls the wind
- There is no sun at night
Q4. Which of the following is NOT a beneficial effect of wind?
- Helps in pollination and seed dispersal
- Generates electricity through windmills
- Brings monsoon rains to India
- Causes soil erosion and destruction of crops
Q5. In coastal areas of Tamil Nadu, fishermen know that strong winds blow during certain months. These winds are called:
- Western disturbances
- Monsoon winds
- Trade winds
- Polar winds
Short Answer Questions
Q6. Explain how wind is formed. Why does air move from one place to another?
Q7. Describe the formation of sea breeze during the day and land breeze at night with a simple diagram in words. Why do fishermen in coastal areas prefer to go fishing early in the morning?
Q8. How does uneven heating of the Earth by the sun create wind patterns? Why do coastal areas experience regular winds while desert areas have irregular, strong winds?
Q9. Name three beneficial uses of wind for humans and nature. Also mention one harmful effect of very strong winds.
Long Answer Questions
Q10. Explain the formation of wind in detail. Describe how uneven heating between land and sea creates sea breezes and land breezes. Why does this pattern reverse between day and night? How does this knowledge help fishermen and farmers in coastal India?
Q11. "Wind is both a friend and a foe to humanity." Discuss this statement by explaining: how wind helps in pollination and seed dispersal in nature, how wind energy is harnessed in places like Jaisalmer and Muppandal in India, how wind brings monsoon rains, and how cyclones and strong winds cause destruction in coastal states like Odisha and West Bengal.
APPLICATION / ANALYSIS
Q12. Case Study - Wind Patterns in Two Cities:
A student recorded wind data in June:
| Header | Header | Header | Header |
|---|---|---|---|
| Chennai (coastal) | 2 PM | Sea → Land | 35°C (land), 30°C (sea) |
| Chennai (coastal) | 2 AM | Land → Sea | 26°C (land), 28°C (sea) |
| Delhi (inland) | 2 PM | Variable | 42°C |
| Delhi (inland) | 2 AM | Calm | 28°C |
Answer the following:
(a) Explain why the wind in Chennai blows from sea to land at 2 PM but reverses at 2 AM. Use the concept of pressure differences.
(b) Why does Delhi show variable or calm winds while Chennai shows a clear pattern?
(c) A kite festival is planned in Ahmedabad in January. Based on your understanding of wind, would morning or afternoon be better for flying kites? Justify your answer.
Q13. Real-Life Application - Windmill Design Challenge:
Your school is visiting a wind farm in Kutch, Gujarat. You observe that:
The windmills are very tall
They have three long blades
They are placed on hilltops, not in valleys
They face the direction from which the wind usually blows
Answer the following:
(a) Why are windmills built very tall rather than short? Explain using your knowledge of wind speed at different heights.
(b) Why are they placed on hilltops and facing the wind direction? What would happen if they were placed in a valley surrounded by buildings?
(c) India is the third-largest producer of wind energy in the world. What does this tell you about the potential of wind as a natural resource for our country's future?