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20) Give reasons.(a) We can not go to the centre of the Earth(b) Today's world is shrinking(c) There is scanty vegetation in desert. |
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Answer» a)We cannot reach by drilling.Simply because it's too hot and too much pressure underneath.Temperatures can go beyond 1000 degrees Celsius. The pressure can be upto 20 Gigapascals. And that's just the mantle.Now suppose you are drilling with a high temp resistant Tunnel Boring Machine( now human survival at high temp is out of question). b)Today's world is shrinkingbecause of globalization and improved means of transportation and communication. Due to improved communication system, we can talk or get connected with each other in theworldat any any time by internet, phones etc. ... That is why theworldhas now became small villa or getshrink. c)Both the conditions are not favourable for the growth ofvegetation. Besides this,thereis poor rainfall in thedeserts. Due to lack of sufficient water,desertsusually havescanty vegetation. People of the Saharadesertswear heavy robes in order to protect themselves from the dust storms and hot winds. |
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