Class 7 Geography Chapter 5 Question Answers - Water

Very Short Q & A :

Q1: Name the available water resources on earth.

Ans : Oceans, seas, lakes, rivers, ice, ground water and moisture in the air.

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

Ans : Freshwater.

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

Ans : 0.006 per cent

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

Ans : True

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

Ans : Groundwater

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

Ans : Vapour

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

Ans : Aquifer

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

Ans : Infiltration

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

Ans : Evaporation

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

Ans : Condensation

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

Ans : Drought

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

Ans : Flood

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

Ans : All of the above

Q14: Why ice floats on water?

Ans : Ice is lighter than water so floats on water.

Q15: Name the gaseous form of water around us.

Ans : Water vapour present in the air around us.

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

Ans : True

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

Ans : True

Q18: Clouds then release the water through ___________________.

Ans : Precipitation

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

Ans : Yes

Q20: What is water management?

Ans : Water management is the continuous matching of water resources with the water requirements of a place.

Q21: What do you mean by water harvesting?

Ans : Instead of letting rainwater run -off into the sea, it can be used to recharge ground water. This is known as rainwater harvesting.

Q22: State the advantage of water harvesting?

Ans : Rainwater harvesting can be used to raise the water table in arid areas.

Q23: What is drip irrigation?

Ans : Drip irrigation is an economical way of using water.

Q24: State the use of water in plants.

Ans : Plants need water to absorb nutrients from the soil and make their food.

Q25: Which day is celebrated as World Water Day?

Ans : 22 March

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

Ans : Water cycle

Q27: Name the region in Gujarat having very eratic rainfall.

Ans : Bhujpur in the Kutch area of Gujarat

Q28: Define infiltration.

Ans : Infiltration is the process of seeping of water into the ground.

Q29: What is aquifer?

Ans : An aquifer is a body of saturated rock through which water can easily move.

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

Ans : All of the above

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

Ans : With the help of tube wells or hand pumps.

Q32: How does underground water gets replenished?

Ans : By seepage of rainwater.

Q33: State factors affecting water table.

Ans : Increasing population, increasing industries, increasing agricultural activities and scanty rainfall.