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5. Once the magma reaches the air it is called laya, earthquake fault at very high speeds., waves are the vibrations and movements that travel from the, Fill in the blanks., chapter -14', carthquape, seismic, An, 1., is the sudden shaking of the Earth's crust., The, cyclones mainly occur in the tropical, he land after the floods may become infertile, 3., and temperate regions, extinat, possibility of its eruption now., Landslide, of the world., due to the erosion of the top layer., volcano is the one which has erupted thousands of years ago and there, 6. An, is no, 7., avalanche, Is the movement of rocks, debris and earth down a hill or mountain slope., 8. An, is a rapid rush of snow down a hill or mountain slide., 1 Natural disasters are unpleasant and can destroy property and cause injury., Irue, 2 Earthquakes usually occur during the night., 3 The vibrations of the earthquake are measured by an instrument called rain gauge. Jalse X, False X, 4. During cyclones, winds blow in the anti-clockwise direction in the Northern Hemisphere, and clockwise direction in the Southern Hemisphere., Iriue, 5. Lack of properly developed rainwater harvesting methods is a major cause of voicanic, eruptions., False X, I. Match the following., 1. earthquake C, 2. cyclone E, 3. floods F, 4. droughts A, 5. volcanic eruption B, 6. avalanche S, a. widespread migration, b. magma, С., Richter Scale, d., snow slide, е., typhoons, f. high water levels, V. Answer the following questions., hat is an earthquake? What are the main causes of an earthquake?, racteristics of a cyclone? Why are they destructive?, saused by the floods?, the poor farmers?
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Chap. 14, JASSA, Date, Page, An 3. The following damaging fecda, are caused bry the flood", There is huge Los of life, Lack f pnoper drinking waten., 3. Houses, bridges itc. get damaan, by water., 1., 2., 4., hess of anops., 5., It alsó' affects the quality f, soil., What are droughts?, -Ans 4 Aroughts happen when sunface, 0r underground waten is, reduced grieatly and when rain, does not occur during dong, periods oftime., Q.5. What are Valcamees 2 What are, their types, landfarm-, mountain where molten rock, Ans.5. A Volcano is a, a, erupts through the surface, Yolcamoes are-, Three types
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Chop. 14, clasSAute, Date, Page, 1. Active Volcanas, 2 Darmant Volcamoes, 3. Extinct Volcanoes, 0.6 What do you meanby landslides, and aralinches ?, Ana -6 Landslide is the movement of, rocks, debris and earth down a, hill ar mountain slope., An avalenche is a napid rush of, show down a hill ar mountain, slide.
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Ways to Minimise the Risk Posed by Landslides, the site and the history of landslides in the area., one, Thus, by following different security measures and different precautions, one can -, Sum it up., One should take safety measures to reduce the risk associated with natural'disasters., * If there is an early warning to the earthquake, people can evacuate their homes and, move to safer places., If there is a warning for cyclones fishermen should not go out in the open seas., Attempts should be made by the people to move to higher areas when there is a risk of, flood in a region., The best way to fight droughts is to practice rainwater harvesting., • More greenery should be maintained on mountains and hill slopes to avoid landslides., Chapter-15, cl. I, Lesson Workout, I. Fill in the blanks., 1. During an larthquake, one should stay away from windows and furniture that can fll, on us., 2. Cyclones are usually predicted by the Meteoralogicaldepartment., 3. During loods, one should keep away from wiring and loose wires., The best way to fight droughtis to practice rainwater harvesting, on cover protects land from landslides and soil erosion., 4., Vegetation, II. Write 'T' for true and 'F' for false statements., 1. During an earthquake if you are outdoors, move to an open area away from, buildings, trees, wires and electric poles., 2. During an earthquake one should make use of lifts and elevators., 110
