Rain - Water Cycle and Importance - UNSOLVED PRACTICE SET
Chapter: Natural Resources | Topic: Rain Water Cycle and Importance
RAIN - WATER CYCLE AND IMPORTANCE - UNSOLVED PRACTICE SET
Topic: Rain Water Cycle and Importance
Multiple Choice Questions
Q1. The process by which water changes from liquid to vapour and rises into the atmosphere is called:
- Condensation
- Evaporation
- Precipitation
- Transpiration
Q2. Clouds are formed when:
- Water vapour rises and cools, turning back into tiny water droplets
- The sun heats the clouds directly
- Wind blows water into the sky
- Rain falls upward
Q3. Rainfall in India is mainly brought by:
- Western winds from Europe
- Monsoon winds from the Indian Ocean and Bay of Bengal
- Winds from the Himalayas
- Underground water springs
Q4. Which of the following is a major source of water vapour in the atmosphere?
- Only oceans and seas
- Oceans, rivers, lakes, and transpiration from plants
- Only rivers
- Only clouds
Q5. During the water cycle, when water vapour cools at high altitudes and forms tiny droplets around dust particles, this process is called:
- Evaporation
- Condensation
- Infiltration
- Runoff
Short Answer Questions
Q6. Draw the water cycle in words (or describe it step by step). Name the four main processes involved in the water cycle.
Q7. Why is rain important for life on Earth? List four reasons why farmers in India wait eagerly for the monsoon rains every year.
Q8. Explain how transpiration from plants contributes to the water cycle. Why do areas with dense forests like the Western Ghats receive more rainfall than nearby deforested areas?
Q9. What are the main sources of water vapour in the atmosphere? Why do coastal areas like Goa receive more rain than desert areas like Jaisalmer?
Long Answer Questions
Q10. Describe the water cycle in detail with all its stages: evaporation, transpiration, condensation, precipitation, and collection. Explain how the sun acts as the main driving force of this cycle. Why is the water cycle called a "continuous cycle" with no beginning or end?
Q11. "The monsoon is the lifeline of Indian agriculture." Discuss this statement by explaining: how monsoon winds are formed, why they bring rain to India, what happens when the monsoon is delayed or weak (like drought), and what happens when the monsoon is too heavy (like floods). How does this affect farmers in states like Punjab, Maharashtra, and Kerala differently?
APPLICATION / ANALYSIS
Q12. Case Study - Rainfall Patterns in India:
The India Meteorological Department recorded rainfall data:
| Region | Annual Rainfall | Main Season |
|---|---|---|
| Cherrapunji (Meghalaya) | 11,000 mm | Monsoon |
| Mumbai (Maharashtra) | 2,400 mm | Monsoon |
| Delhi | 800 mm | Monsoon |
| Jaisalmer | 200 mm | Occasional |
Answer the following:
(a) Why does Cherrapunji receive the highest rainfall in India? Explain using the concept of monsoon winds and mountain barriers.
(b) Calculate how many times more rain Mumbai receives compared to Jaisalmer. What does this difference mean for agriculture and water availability in these two places?
(c) If global warming causes monsoon winds to become weaker, which of these regions would suffer the most? Why?
Q13. Real-Life Application - Rainwater Harvesting at School:
Your school in Chennai wants to install a rainwater harvesting system. The school building has a roof area of 500 square metres. Chennai receives about 1,400 mm of rain per year.
Answer the following:
(a) Calculate approximately how many litres of rainwater can be collected from the roof in one year. (Hint: 1 mm of rain on 1 square metre = 1 litre)
(b) If the school uses 2,000 litres of water per day for drinking, cleaning, and gardening, for how many days could the collected rainwater last? Show your calculation.
(c) Why is rainwater harvesting especially important in cities like Chennai and Bangalore that face water shortages? Mention one environmental benefit.