Question 1: Mark T if the statement is true and F if it is false:
Answer: (a) T, (b) F, (c) F, (d) T
Question 2: Explain how groundwater is recharged?
Answer: The surface water seeps down the ground through the porous layers of the soil. This process is called infiltration and is responsible for recharging the groundwater.
Question 3: There are ten tubewells in a lane of fifty houses. What could be the long term impact on the water table?
Answer: Ten tube-wells in a lane of fifty houses can lead people to mindlessly exploit the groundwater. This can lead to depletion of the water table in the long run.
Question 4: You have been asked to maintain a garden. How will you minimise the use of water?
Answer: Drip irrigation can be used in the garden to minimize the use of water.
Question 5: Explain the factors responsible for the depletion of water table.
Answer: Following factors are responsible for depletion of water table:
Question 6: Fill in the blanks with the appropriate answers:
Answer: (a) wells and tube-wells, (b) ice, water and vapour, (c) aquifer, (d) infiltration
Question 7: Which one of the following is not responsible for water shortage?
Answer: (iii) Heavy rainfall
Question 8: The total water
Answer: (iv) Of the world remains constant
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