CBSE Class 7 Science Winds Storms and Cyclones MCQs

Winds, Storms and Cyclones

Question. The wind speed during the second cyclone that hit Orissa during the year 1999 on 29 th October was
(a) 260km/hr 
(b) 200km/hr
(c) 150km/hr
(d) 100km/hr

Answer: A

Question. The change in shape of a hot tin can when pored with cold water on it is due to the 
(a) pressure inside the can is less than that outside
(b) pressure inside the can is more than that outside 
(c) pressure outside the can is same as that inside
(d) Pressure inside the can is equal to the atmospheric pressure

Answer: A

Question. The paper ball kept near the mouth of a plastic bottle will be pushed out because 
(a) the air pressure inside the bottle is same as that at the mouth
(b) the air pressure inside the bottle is more than that at the mouth
(c) the air pressure inside the bottle is less than that at the mouth
(d) the pressure inside and outside the bottle same.

Answer: B

Question. Increased wind speed is accompanied by 
(a) no change in temperature
(b) Reduced pressure 
(c) increased pressure
(d) No change in pressure

Answer: B

Question. Air moves faster between two places when the pressure difference between the place is 
(a) less
(b) zero
(c) More
(d) equal to the atmospheric pressure
e. Warm air is ___________than cold air 
f. Heavier 
g. lighter
h. no difference in weight 
i. very much lighter

Answer: C,G

Question. The centre of a cyclone is a calm area and is called the _________of the storm. 
(a) eye
(b) Focus
(c) Centre
(d) Radius 

Answer: A

Question. A cyclone is called a________in the American Continent. 
(a) Hurricane
(b) Typhoon 
(c) Tornado 
(d) Thunderstorm 

Answer: A

Question. A cyclone is called a____________in Philippines and Japan. 
(a) Hurricane 
(b) Typhoon 
(c) Tornado 
(d) Thunderstorm

Answer: B

Question. A dark funnel shaped cloud that reaches from the sky to the ground is called a 
(a) Hurricane
(b) Typhoon
(c) Tornado
(d) Thunderstorm

Answer: C

Question. A violent tornado travel at a speed of about 
(a) 100 km/hr
(b) 200km/hr
(c) 300km/hr
(d) 50km/hr

Answer: C

Question. The instrument that measures the wind speed in a cyclone is 
(a) Anemometer
(b) Barometer
(c) Thermometer
(d) Ammeter

Answer: A

Question. Which one of the following places is unlikely to be affected by a cyclone
(a) Chennai
(b) Mangalore 
(c) Amritsar (d) Puri

Answer: C

Question. ____________helps us announce a cyclone alert 
(a) Satellite 
(b) Stars 
(c) Sun
(d) moon

Answer: A

Question. Choose the correct statement
(a) The moving air is called wind
(b) Uneven heating on the earth is the main cause of wind movements.
(c) Air exerts pressure
(d) All are correct

Answer:  D

Question. Air flows from a region of
(a) Low pressure to high pressure
(b) High pressure to low pressure
(c) Depends on the season
(d) None of these

Answer:  B

Question. A can filled with hot water gets distorted when cold water is poured over it. This happens because
(a) the pressure of air inside the can decreases than the pressure outside
(b) the pressure of air inside the can increases than the pressure outside
(c) the pressure of air inside the can becomes equal to the pressure outside
(d) it is natural tendency of can to get distorted.

Answer:  A

Question. Choose the correct alternative
(a) High speed winds are accompanied by increased air pressure
(b) In summers, wind flow from land to oceans
(c) In summers, wind flow from oceans to land
(d) None of these

Answer:  C

Question. The centre of cyclone is called
(a) Centre
(b) Middle 
(c) Eye
(d) Neck

Answer:  C

Question. The development of cyclones depends on
(a) Wind speed
(b) Temperature
(c) Humidity
(d) All of the above

Answer:  B

Question. The speed of wind is measured by
(a) Ammeter
(b) Anemometer
(c) Nanometer
(d) Windmeter

Answer:  D

Question. Which of the following is correct about thunderstorms?
i) Thunderstorms develop in hot, humid tropical areas.
ii) Thunderstorms carry lightning and sound.
(a) Both (i) is correct
(b) Only (ii) is correct
(c) Both (i) and (ii) are correct
(d) Both are wrong

Answer:  C

Question. Which of the following is correct about cyclone?
i) A cyclone is created by a very high pressure system.
ii) A cyclone is created by a very low pressure system
iii) The eye of a cyclone is a calm area. Out of these
(a) Only (i) is correct
(b) Only (ii) is correct
(c) Both (ii) and (iii) are correct
(d) Both (i) and (iii) are correct

Answer:  C

Question. Which one of the following place is unlikely to be affected by a cyclone.
(a) Chennai
(b) Mangalore
(c) Amritsar
(d) Puri

Answer:  C

Subjective Questions

1. Explain an activity which shows air exerts pressure.

2. Explain an activity which shows high speed winds are accompanied by reduced air pressure.

3. Define thunderstorms. Explain how it develops.

4. Explain an activity which shows air expands on heating.

5. Explain how uneven heating of land and water results in the generation of wind currents.

6. Explain the formation of cyclones.

7. Explain the construction and working of an anemometer with a diagram.

8. List few destructions caused by cyclones.

9. Explain how uneven heating between the equator and the poles results in the generation of wind currents.

10. List some of the precautions that should be taken in a cyclone hit area?