Multiple Choice Questions................
Question 1: Which of the following does not show water shortage?
(a) Taps running dry.
(b) Long queues for getting water.
(c) Marches and protests for the demand of water.
(d) A family gets three buckets of water per person per day.
Solution 1: (d) A family gets three buckets of water per person per day.
50 litres of water per person per day is recommended by the United Nations. It does not demonstrate the lack of water whether a family gets three buckets of water per day.
Question 2: Seas and oceans are full of water on earth. However, a very small percentage of water present on earth is available for us. This percentage is roughly
(a) 0.006%.
(b) 0.06%.
(c) 0.6%.
(d) 6%.
Solution 2: (a) 0.006%
Around 97.4% of the earth's total water is in the seas and oceans. In the glaciers and polar ice caps, only 2 percent of the water is frozen. The remainder, i.e., in liquid form, just 0.6 percent is usable as freshwater. In this, 0.59 percent is current as groundwater and just 0.01 percent is accessible on the surface of the planet as fresh water.
Question 3: Which of the following are not the liquid forms of water?
(i) Snow
(ii) Lake water
(iii) River water
(iv) Water vapour
(v) Ice
Choose the correct combination from the options below.
(a) (i), (iv) and (v)
(b) (i) and (ii)
(c) (ii) and (iii)
(d) (iv) only
Solution 3: (a) (i), (iv) and (v)
Although water vapour is the gaseous state of water, snow and ice are solid sources of water.
Question 4: A man digging the ground near a water body found that the soil was moist. As he kept digging deeper and deeper he reached a level where all the spaces between particles of soil and gaps between rocks were filled with water. The upper limit of this layer is called
(a) water level.
(b) water table.
(c) groundwater.
(d) water limit.
Solution 4: (b) water table.
The upper boundary of the layer where water is present between soil particles and holes between rocks is called the water table, and groundwater is referred to as water below this layer.
Question 5: Which of the following is a way to use water economically?
(a) Construction of bawris
(b) Rainwater harvesting
(c) Drip irrigation
(d) Infiltration
Solution 5: (c) Drip irrigation
In drip irrigation, water is dropped drop by drop, which enters the plant's roots directly. This minimizes water wastage and helps to suppress the weeds as well.
Question 6: On which of the following day is World Water Day observed?
(a) 22 March
(b) 14 November
(c) 2 October
(d) 21 December
Solution 6: (a) 22 March
World Water Day is observed on 22nd March.
Question 7: The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of
(a) 5 litres
(b) 15 litres
(c) 30 litres
(d) 50 litres
Solution 7: (d) 50 litres
United Nations recommends 50 litres of water per person per day for the purpose of drinking, washing and other persons.
Question 8: “Every Drop Counts” is a slogan related to
(a) counting of drops of any liquid.
(b) counting of water drops.
(c) importance of water.
(d) importance of counting.
Solution 8: (c) the importance of water.
“Every Drop Counts” is a slogan related to the importance of water.
Question 9: Water cycle does not involve which of the following?
(a) Evaporation
(b) Condensation
(c) Formation of clouds
(d) Rainwater harvesting
Solution 9: (d) Rainwater harvesting
Water travels through the atmosphere and continually returns to the earth, and this is known as the flow of water. Rain evaporates from water bodies to create water vapour in the water cycle. To form clouds, water vapours condense. Clouds are cooled and water, like rain, falls back to earth.
Question 10: Which of the following inhibits the seepage of rainwater into the ground?
(a) A pukka floor
(b) Playground
(c) Grass lawn
(d) Forest land
Solution 10: (a) A pukka floor
A pukka floor is a floor of cement that is water-impenetrable. It is also difficult for water to seep into the pukka floor.
Very Short Answer Questions..............
Question 11: State whether the following statements are True or False. If false, write the correct statement.
(a) Water vapour is the gaseous form of water.
(b) Ice is solid whereas snow is the semi-solid form of water.
(c) Ocean water cannot be used for domestic purposes.
(d) The rapid growth of industries is one of the causes of water shortage.
Solution 11:
a) True
b) False-Ice and snow both are solid forms of water.
c) True
d) True
Question 12: Some definitions are given below which can be corrected by changing one word. Correct them.
(a) An aquifer is a groundwater stored between layers of hard rock above the water table.
(b) The process of evaporation of water in the ground is called infiltration.
(c) The evaporation of water from oceans and its arrival back into oceans is called vapour cycle.
Solution 12:
a) An aquifer is a groundwater stored between layers of hard rock below the water table.
b) The process of seeping of water in the ground is called infiltration.
c) The evaporation of water from oceans and its arrival back into oceans is called water cycle.
Question 13: What is the source of water in each of the following?
(a) Wells
(b) Ground
(c) Atmosphere
Solution 13:
(a) Wells- Groundwater
(b) Ground- Rain
(c) Evaporation- Atmosphere
Question 14: State whether the following statements are true or false. If false, give the correct statement.
(a) The process of seeping of water into the ground is called filtration.
(b) 51% of the earth’s surface is covered with water.
(c) The year 2003 was observed as the International Year of Freshwater.
(d) Snow and ice both are solid forms of water.
Solution 14:
(a) False- The process of seeping of water into the ground is called infiltration.
(b) False- 71% of the earth’s surface is covered with water.
(c) True
(d) True
Short Answer Questions..............
Question 15: Fill in the blanks in the given passage.
The rainwater and ________________ from other sources such as rivers and ponds seeps through the ______________ and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called ______________.
Solution 15:
The rainwater and water from other sources such as rivers and ponds seeps through the soil and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called infiltration.
Question 16: Fill in the blanks and complete the story selecting words from the box given here.
Rajasthan is a _________ and dry place. The challenge of natural _______ of water was met by a successful experiment. A band of social ________ had transformed a _________ area into a green place. They have revived five dried-up ________ by constructing water ___________ structures.
Solution 16:
Rajasthan is a hot and dry place. The challenge of natural scarcity of water was met by a successful experiment. A band of social workers had transformed a dry area into a green place. They have revived five dried-up rivers by constructing water harvesting structures.
Question 17: Place the following statements in a proper order to form a meaningful paragraph.
(a) Which in turn decreases the seepage of rainwater into the ground.
(b) This decreases the open areas like park and playgrounds.
(c) Increasing population create demand for construction of houses, shops, offices, roads and pavements.
(d) This results in depletion of the water table and creates scarcity of more water.
Solution 17:
(c) Increasing population create demand for construction of houses, shops, offices, roads and pavements.
(b) This decreases the open areas like park and playgrounds.
(a) Which in turn decreases the seepage of rainwater into the ground.
(d) This results in depletion of the water table and creates scarcity of more water.
Question 18: How can you observe the three forms of water in (i) nature and (ii) at home?
Solution 18:
i) In nature, in the form of snow-solid, water-liquid and vapour-gaseous phases, we will detect water.
ii) At homes, we can detect the water in the form of water- liquid, ice-solid and steam-gaseous forms.
Question 19: Complete the given table:
Solution 19:
Question 20: Match Column I with Column II:
Solution 20:
Question 21: A list of jumbled words is given here. Write the correct form of each word.
(a) WASHFERRET
(b) CHARREGE
(c) QUIFERA
(d) WOSN
Solution 21:
(a) Freshwater
(b) Recharge
(c) Aquifer
(d) Snow
Question 22: From where do the following usually get water? In which form is water present in them?
(a) Clouds
(b) Plants
(c) Mountain tops
(d) Aquifer
(e) Animals
Solution 22:
Long Answer Questions..........
Question 23: Complete the following chart by writing appropriate words in the boxes marked (a) to (e).
Solution 23:
(a) Solid
(b) Gaseous
(c) Well
(d) Lake
(e) Ice
Question 24: What is groundwater? What are the sources of water which are fed by groundwater?
Solution 24:
Definition of Groundwater:
Groundwater is considered water located below the water table.
Sources of Groundwater:
Rainwater and water from other sources, such as rivers and ponds, seep into the soil and fill the vacant gaps deep underneath the surface. The mechanism of water seeping into the soil is called infiltration. This method thereby recharges the groundwater. In areas, the groundwater is contained below the water table within layers of hard rock. It is considered as an aquifer. With the assistance of tube wells or hand pumps, water in the aquifers may normally be drained out.
Question 25: Water is very precious for all living beings. What will happen in future if we do not save water now?
Solution 25: Water is upmost need of all living beings. Without it, there can't be any living. We face water shortage if we do not conserve water now, and it will lead to the following consequences.
- In the absence of water, daily tasks would become very complicated.
- Production of crops would be impaired, resulting in an inadequate food supply.
- It will be appropriate for people to buy water at high rates.
- People can drink dirty (contaminated) water that causes diseases like cholera that are transmitted by water. There would not be enough water enough for plants due to water shortages. To prepare their food through the photosynthesis process, plants need water. The ecological character of the earth would be endangered if water is not accessible to plants. This may mean the end of humanity, because there will be no fruit, no oxygen, no rain, and numerous other issues in the world without plants.