CLASS -VII 

LESSON -WATER

Q1: Name the available water resource on earth.

Q2: Water that is fit for human consumption is called_________________.

Q3: What per cent of total water on the earth is actually available for our use

Q4: As a solid, water exists as icecaps at the poles. True/ False.

Q5: People obtain ---------through tube wells and hand pumps.

Q6: Three forms of water are solid, liquid and ---------.

Q7: The water bearing layer of the earth is ----------.

Q8: The process of water seepage into the ground is called ---------.

Q9: The process of changing of water into its vapour is called---------.

Q10: The process of changing water vapour into water is called ---------

Q11: No rainfall for a year or more may lead to ---------- in that region.

Q12: Excessive rains may cause -----------.

Q13: What are main sources of water?

1. Rainwater
2. Glaciers, ice
3. River water
4. sea and Ocean water
5. All of the above

Q14: Why ice floats on water?

Q15: Name the gaseous form of water around us.

Q16: Sometimes, ground water accumulates between layers of hard rock. This is known as an aquifer. True/False

Q17: Plants use ground water and release it in the form of water vapour during transpiration. True/False

Q18: Clouds then release the water through ___________________.

Q19: Is increasing population is the reason for depletion of water table?

Q20: What is water management?

Q21: What do you mean by water harvesting?

Q22: State the advantage of water harvesting?

Q23: What is drip irrigation?

Q24: State the use of water in plants.

Q25: Which day is celebrated as World’s Water Day?

Q26: Name the process responsible for maintenance of water on earth.

Q27 write differences between hard and soft water?

Q28: Define infiltration.

Q29: What is aquifer?

Q30: Which of the following is the reason for depletion of water table?

1. Increasing population
2. Increasing industries
3. Deforestation
4. All of the above

Q31: How water in an aquifer can be pumped out?

Q32: How does underground water gets replenished?

Q33: State factors affecting water table

.Q34: You have been asked to maintain a garden. How will you minimise the use of water?

Q35: There are ten tubewells in a lane of fifty houses. What could be the long term impact on the water table?

Q36: Explain how we can recharge ground water?

Q37: Show groundwater and water table via a sketch.

Q38: Can we keep on drawing water from underground, how it will affect the water table?

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q39 Explain the factors responsible for depletion of water table.