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Chapter 8 Winds, Storms and, Cyclones, Exercise Questions, 1. Fill the missing word in the blank, spaces in the following statements:, , (a) Wind is----air., b) Winds are generated due to, , -heating on the earth., , )Nearthe earth's surface, air rises up whereas, air comes down., , Air moves from, , a, , region of----, , pressure to a region of---pressure., , Solution:, , (a) Wind is moving air., (b) Winds are generated due to uneven, heating on the earth., (c) Near the earth's surface, warm air, rises up whereas cold air comes down., , (d) Air moves from a region of high air, pressure to a region of low air pressure.
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2. Suggest two methods to find out wind, , direction at a given place., , Solution:, Methods to finding out the wind direction, at a given place are as follows, i. By seeing the direction of dry leaves, , pleased in the air., dy seeing the direction in which it is, ifficult to ride the bicycle., State two, , experiences that made you, , hink that air exerts pressure (other than, those given in the text)., , Solution:, i. When we fill the air in the balloon, it, , becomes tight and if we try to fill more air, balloon will get burst which proves air, exerts pressure., , ii. Wind causes curtains, doors and, , windows to move with the direction of the, wind. This demonstrates air exerts, pressure.
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4. You want to buy a house. Would you, buya house having windows but, no ventilators? Explain your answer., , liketo, , Solution:, It is not a good idea to buy a house, without ventilators because warm air is, , lighter than cold air hence warm air, , asses out of your home through, entilators. Accordingly, without, entilators, warm air will not pass out, and, he house will remain warm., , .Explain why holes are made in, hanging banners and hoardings., , Solution:, Holes in the banners and hoardings helps, air to pass through it. Hence, banner can, withstand the pressure of the air and, remains intact., 6. How will you help your neighbours in, case cyclone approaches your, , village/town?, , Solution, We can help our neighbours in case a, , cyclone approaches, by any of the, following measures:
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By helping them shift to a safer, , place., .By helping them to shifttheir, animals, necessary households and, vehicles to a safer place., By calling emergency services such, , as fire station, police and medical, centres., , What planning is required in advance, deal with the situation created by a, yclone?, , olution:, We should not ignore the warnings, issued by the meteorological, department through TV, radio, or, newspapers., . W e should -, , make necessary, , arrangements to shift the essential, household goods, domestic animals, and vehicles, etc. to safer places;, , Avoid driving on roads through, standing water, as floods may have, damaged the roads., , .Phone numbers ofall emergency, , services like police, fire brigade, dh, medical centres should be handy.
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Always store drinking water for, , emergencies., Do not touch wet switches and fallen, power lines., , .Do not pressurise the rescue force by, , making undue demands., , .Cooperate and help your neighbours, and friends., Which one of the following places is, nlikely, , to be affected by a cyclone?, , Chennai, , i) Mangaluru (Mangalore), (ii) Amritsar, (iv) Puri, , Solution:, The answer is (ii) Amritsar because, Amritsar is far away from the sea while, the remaining three are coastal areas and, , are more ikely to be hit by cyclone.
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9.Which of the statements given below, is correct?, , ) In winter the winds flow from the land, to the ocean., , ii) In summer the winds flow from the, land towards the ocean., , i), A cyclone is formed by a very high, , ressure system with very high-speed, revolving around it., , inds, , v) The coastline of India is not, ulnerable to cyclones., , Solution:, The answer is () In winter, the winds flow, from the land to the ocean.
