MCQ Questions for Class 7 Science: Ch 8 Winds, Storms and Cyclones

MCQ Questions for Class 7 Science: Ch 8 Winds, Storms and Cyclones

1. How are sea and land breezes caused?
(a) Through convection currents
(b) Through cyclones
(c) Through rains
(d) Through conduction
► (a) Through convection currents

2. Lightning is usually accompanied by
(a) Rain
(b) Earthquake
(c) Thunder
(d) Floods
► (c) Thunder

3. The eye of storm is a
(a) Heavy rain area
(b) Calm area
(c) Highly active area
(d) High velocity storm area
► (b) Calm area

4. What is an anemometer?
(a) A device for measuring atmospheric pressure
(b) A device for measuring wind speed
(c) A device for measuring atmospheric temperature
(d) A device for measuring humidity
► (b) A device for measuring wind speed

5. For escape of hot air room has
(a) Ventilators
(b) Windows
(c) High walls
(d) Doors
► (a) Ventilators

6. Reduced air pressure cause
(a) Heavy rain
(b) Decreased wind speed
(c) Increased wind speed
(d) Bright sun light
► (c) Increased wind speed

7. Wind air is generated due to
(a) Even heating of earth
(b) Cooling down of earth
(c) Uneven heating of earth
(d) Condensation of hot air
► (c) Uneven heating of earth

8. Wind speed results in storm, which can be
(a) Used to rotate wind mill
(b) Highly destructive
(c) Highly useful
(d) Used to produce electricity
► (b) Highly destructive

9. Rapid expansion of air due to lightening cause
(a) Flood
(b) Cyclone
(c) Thunder
(d) All of these
► (c) Thunder

10. Building can be protected from lightening by using
(a) Lightening rod on the levels of building
(b) Lightening rod at the top of building
(c) Wooden logs at the top of building
(d) All of these
► (b) Lightening rod at the top of building

11. Cyclone is followed by
(a) Darkness
(b) Brightness
(c) Flood
(d) Drought
► (c) Flood

12. From where do the monsoon winds come to India?
(a) Northeast                         
(b) Northwest        
(c) Southeast         
(d) Southwest
► (d) Southwest

13. With increase in temperature, atmospheric pressure ___________.
(a) increases
(b) decreases
(c) remains constant
(d) can decrease or increase
► (b) decreases

14. Cyclone is also known as
(a) Hurricanes
(b) Thunder
(c) Tsunamis
(d) Storms
► (a) Hurricanes

15. Which of the following part of India is generally not affected by cyclone?
(a) Eastern costal region
(b) Southern region
(c) Eastern region
(d) Northern region
► (d) Northern region

16. Sudden occurrence of light due to friction of clouds is called
(a) Storm
(b) Flood
(c) Cyclone
(d) Lightening
► (d) Lightening

17. On the earth, the winds from the north and the south blow towards the equator. What can we understand from this?
(a) Earth is round or spherical in shape.
(b) It is hotter in and around the equator.
(c) It is hotter in and around the north and the south.
(d) Wind does not flow from the east or the west.
► (b) It is hotter in and around the equator.

18. Cold air is _______________ than warm air.
(a) Less moist
(b) Heavier
(c) Less denser
(d) Lighter
► (b) Heavier

19. During flood, contamination of water causes shortage of
(a) Shelter
(b) Food
(c) Bathing water
(d) Drinking water
► (d) Drinking water

20. Which of the following plays an important role in the early-warning systems for cyclones?
(a) Helicopters   
(b) Submarines      
(c) Satellites            
(d) Stars
► (c) Satellites            

21. A wind vane is used to measure the
(a) Air humidity
(b) Wind direction
(c) Air pressure
(d) Wind speed
► (b) Wind direction

22. Which of the following is true of the 'eye' of a cyclone?
(a) It is an area of high pressure
(b) It is an area of low pressure
(c) It has lots of clouds and rains
(d) It has high temperature
► (b) It is an area of low pressure
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