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Chapter 14: Water, , A, , Fr, , Tick (/) the correct options., , 1. (d) 2 3. (b) 4. (b) 5. (a) 6. (d), Fill in the blanks., , 1. Solid 2. watersupply 3. transpiration © 4. drought, , 5. Rainwater harvesting 6. soil erosion, , State whether the following statements are true (T) or false (F)., 1. ¥ az F 3 6T 4 F 5: F, , Very Short Answer Questions., , 1. (a) water (liquid) — (b) ice (solid) —_(c) steam (vapour), , 2. Cholera, , 3. Groundwater or underground water, , 4. Sources of water are surface water, rainwater and underground water, or subsoil water., , , , 5. The processes involved in water cycle are, (i) evaporation or transpiration, })_ formation of clouds by condensation, (iii) precipitation, Short Answer Questions., 1. (i) Coming down of water in the form of rain, hail or snow is called, , precipitation., , (ii) The process of collecting rainwater from roofs and streets and, storing it for further use is called rainwater harvesting., , 2. a) The problem of water shortage is increasing day by day due to, increasing population., , (b) Pooja’s actions show her helpful nature., , 3. Rain is useful to us because it, , (i) cools the environment., (ii) supplies water for irrigation., (iii) maintains the supply of water on land and raises the water table., , 4, Water acts as a medium for the transportation of minerals and other, nutrients from one part of plant to another., , 5. The life of animals living in soil gets affected by heavy rain, as the land, gets covered with water. The animals (like snake and earthworm) that, live in soil come out in search of air and food., , 6. The advantage of rainwater harvesting is that it increases the availability, of groundwater which helps us to overcome water scarcity problems, especially during dry season., , Long Answer Questions., , 1. (a) The flood water submerges the standing crops, grasslands and, forests. Due to this, the plants do not get sufficient amount of air, and nutrients and die., , (b) The problems faced by people after floods are—, , (i) Flood in city areas lead to waterlogged roads and streets. This, disrupts the traffic on road and causes inconvenience to the, people., , (ii) Floods cause extensive damage to crops. This may cause acute, food shortage, and deaths due to hunger., , (iii) Flood cause serious injuries or death of domestic animals by, drowning., , (iv) When flood water recedes, it causes spreading of diseases like, cholera, dysentery, diarrhoea, etc., , {v)_ Floods wash away the top layer of soil thus reducing the fertility, of soil.
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2., , (a), , (b), , (c), , As the population is increasing rapidly, the number of people using, water is also increasing day by day. Also, more and more water is, being used in agriculture for producing food and by the industries, which manufacture a large variety of products for our use. All these, factors are leading to shortage of water in many parts of the world, including our country. Keeping in view the shortage of usable water,, it is essential that water is used carefully. We should take care not, , to waste water., , The ways to conserve water are—, , (i) Plant more and more trees, , (ii) Use a bucket and a mug instead of shower while taking bath, (iii) Close the taps tightly after using them, , (iv) Avoid cleaning utensils under running water, , (v) Check overflowing of water tanks, , (vi) Recycle wastewater, , (vii) Adopt rainwater harvesting to store the rainwater., The two main types of rainwater harvesting are, , (i) Rooftop rainwater harvesting, , (ii) Roadside rainwater harvesting
