Winds, Storms and Cyclones
Science · Class 7 · CBSE
ScienceClass 7CBSEEasy
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Jasmine inflated a balloon with air. The balloon becomes larger in size because
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31 multiple choice questions on Winds, Storms and Cyclones — Science, Class 7. Open any question for its answer and explanation.
Q1.A tornado
- A.can have diameter as small as a metre and as large as a km, or even wider
- B.has a funnel which does not suck everything near it at the base
- C.has a funnel which does not throw dust and debris out near the top
- D.cannot have a diameter of the order of 10 metres
Q2.Consequences of cyclones are:
- A.they do not cause severe loss of life and property
- B.they increase the fertility of soil by bringing in natural fertilizers
- C.they reduce the fertility of soil
- D.they help in the development of a country
Q3.Cyclones are formed because of the
- A.absorbance of heat in the vaporization of water
- B.emission of heat in the condensation of water
- C.absorbance and emission of heat due to inter-conversion of states of water
- D.conduction of wind current
Q4.When water condenses from vapour state to liquid state,
- A.heat is given out
- B.heat is absorbed
- C.heat is absorbed and then given out
- D.there is no exchange of heat
Q5.When water changes its state from liquid state to vapour state,
- A.heat is given out
- B.heat is absorbed
- C.heat is given out and then absorbed
- D.there is no exchange of heat
Q6.Thunderstorms usually occur in
- A.cold, humid tropical areas
- B.cold, dry tropical areas
- C.hot, dry tropical areas
- D.hot, humid tropical areas
Q7.If a storm is accompanied by lightning, we should
- A.take shelter under an isolated tree
- B.take shelter under an umbrella with a metallic end
- C.not sit near a window, open garages, storage sheds
- D.take shelter under metal sheds
Q8.In winter, near the equator
- A.wind flows from the land towards the oceans
- B.wind flows from west to east
- C.wind flows from the oceans towards the land
- D.wind flows from east to west
Q9.In winter, near the equator the temperature of the land is
- A.higher than that of the oceans most of the time
- B.lower than that of the oceans most of the time
- C.equal to that of the oceans most of the time
- D.close to that of the oceans most of the time
Q10.Monsoon winds bring
- A.rain from oceans to land
- B.rain from land to oceans
- C.dust from oceans to land
- D.dust from land to oceans
Q11.Monsoon winds are the winds that flow from
- A.the land towards the oceans in summer
- B.the oceans towards the land in summer
- C.the land towards the oceans in winter
- D.the oceans towards the land in winter
Q12.In summer, near the Equator
- A.wind flows from the land towards the oceans
- B.wind flows from west to east
- C.wind flows from the oceans towards the land
- D.wind flows from east to west
Q13.In summer, near the equator the temperature of the land is
- A.lower than that of water in the oceans most of the time
- B.higher than that of water in the oceans most of the time
- C.equal to that of water in the oceans most of the time
- D.close to that of water in the oceans most of the time
Q14.The direction of wind on the earth is
- A.affected by the earth's rotation
- B.unaffected by the earth's rotation
- C.exactly from north to south and vice versa
- D.exactly from east to west and vice versa
Q15.Air moves to the regions in the 0-60 degrees latitude from the
- A.North Pole
- B.South Pole
- C.Equator
- D.North and South Poles
Q16.The poles of the earth are
- A.hotter than the rest of the earth
- B.colder than the rest of the earth
- C.denser than the rest of the earth
- D.lighter than the rest of the earth
Q17.Air moves from the regions in 0-30 degrees latitude belt on either side of the equator towards the
- A.North Pole
- B.South Pole
- C.Equator
- D.North and South Poles
Q18.The regions close to the equator is
- A.colder than the rest of the earth
- B.hotter than the rest of the earth
- C.smaller than the rest of the earth
- D.larger than the rest of the earth
Q19.Convection in air means
- A.movement of air from hotter place to colder place
- B.transfer of heat from hotter place to colder place through air
- C.movement of air from the place of higher air pressure to the lower one
- D.movement of air from the place of lower air pressure to the higher one
Q20.Warm air
- A.is heavier than cold air
- B.moves from hotter place to colder place
- C.does not exert pressure on its container
- D.rises upward
Q21.Convection in air is set up due to
- A.the difference in temperature in different regions
- B.the same temperature in different regions
- C.the same air pressure in different regions
- D.the difference in constituents of air in different regions
Q22.Warm air becomes lighter
- A.because it expands and occupies more space
- B.because it contracts and occupies more space
- C.because it expands and occupies less space
- D.because it contracts and occupies less space
Q23.The difference in air pressure between two regions is caused due to
- A.the difference in constituents of air in the two regions
- B.the difference in temperature of the two regions
- C.the same constituents of air in the two regions
- D.the same temperature of the two regions
Q24.The greater the difference in air pressure,
- A.the slower the water vapour moves
- B.the slower the air moves
- C.the faster the air moves
- D.the greater is the tendency of air to be still
Q25.Air moves from the region of
- A.high air pressure to the region of low air pressure
- B.low air pressure to the region of high air pressure
- C.high water pressure to the region of low water pressure
- D.low water pressure to the region of high water pressure
Q26.Increased speed winds are accompanied by
- A.increased air pressure
- B.reduced air pressure
- C.increased as well as reduced air pressure
- D.increased water pressure
Q27.When water is boiled in a tightly covered can and cold water is poured on it with the lid still attached
- A.the can will become larger in size
- B.the can will get elongated
- C.the can will get distorted
- D.the lid will get blown away
Q28.It is easier to row a boat when wind is blowing from
- A.the left side
- B.the right side
- C.the front
- D.behind
Q29.Jasmine inflated a balloon with air. The balloon becomes larger in size because
- A.of the wind blowing inside the balloon
- B.of the pressure exerted by water particles inside the balloon
- C.of the constituents of air inside the balloon
- D.of the pressure exerted by air inside the balloon on its wall
Q30.Agriculture, transport, communication, and electric supply are
- A.affected by cyclones
- B.not affected by cyclones
- C.improved by cyclones
- D.the causes of cyclones
Q31.Wind is
- A.moving water
- B.non-moving water
- C.moving air
- D.non-moving air