Page 147 - Ripples SCIENCE 7 - TEJPUR Edition 2024 Answer Key

2. Which of the following is the reason for depletion of the water table?

(a) Increasing population (b) Increasing industries
(c) Deforestation (d) All of the above

Ans. (d)
3. Water cycle does not involve which of the following processes?

(a) Evaporation (b) Condensation
(c) Formation of clouds (d) Rainwater harvesting

Ans. (d)
4. Which of the following is a/an efficient method of irrigation?

(a) Construction of baori or baoli (b) Rainwater harvesting
(c) Drip irrigation (d) Infiltration

Ans. (c)
5. Which of the following is not an effect of acute scarcity of water?

(a) Shortage of food (b) Shortage of oxygen
(c) Shortage of carbon dioxide (d) Shortage of rainfall

Ans. (c)
6. Water that collects between the hard rocks below the ground is called .................. .

(a) baoli or baori (b) aquifer (c) well (d) groundwater
Ans. (b)

7. When rainwater is allowed to flow from the roofs of homes through pipelines to
collect in an underground reservoir for use is called ............................... .

(a) pipe rainwater harvesting (b) well rainwater harvesting
(c) rooftop rainwater harvesting (d) underground rainwater harvesting

Ans. (c)
B. Fill in the blanks.

1. The process of changing of water into its vapour is called ....................... .
Ans. evaporation

2. The process of water seepage into the ground is called ....................... .
Ans. infiltration

3. ................. is a method in which plants are watered directly at their roots.
Ans. Drip irrigation

4. Water that is fit for human consumption is called ....................... .
Ans. potable water

5. Deep step wells that were used to store rainwater in olden days are called
....................... .

Ans. baoris or baolis

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