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Winds, Storms and Cyclones (Class VII)

Test your knowledge about winds, storms, and cyclones including measurement instruments, air pressure principles, types of storms, wind patterns, and safety precautions during thunderstorms.

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

_________ is an instrument used for measuring wind speed.

  1. Stethoscope
  2. Anemometer
  3. Voltmeter
  4. Barometer
  5. Micrometer
Question 2 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. At sea level, air exerts a pressure of 10.33 kg/cm3.
b. Monsoon is the system of winds that move from the sea towards the land in the latitudes of 5 degree to 30 degree.
c. Increased wing speed is accompanied by reduced air pressure.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 3 Multiple Choice (Single Answer)

Insecticide spray pumps work on which of the following principles?

  1. Air expands on heating and contracts on cooling.
  2. Hot air rises upwards and cold air sinks down.
  3. Moving air exerts pressure.
  4. High speed winds are accompanied by reduced air pressure.
  5. None of these
Question 4 Multiple Choice (Single Answer)

Match the following:

 
a. Cyclone 1. It is the dark funnel shaped cloud formed on land such that it reaches from the sky to the ground.
b. Thunderstorm 2. It is the storm accompanied by rain and lightning and moving at a speed of 89-102 km/h.
c. Tornado 3. It is the spiralling winds formed in tropical seas due to the formation of low pressure region in sea and moving at a speed of 120 km/h.
  1. a - 3, b - 1, c - 2
  2. a - 3, b - 2, c - 1
  3. a - 2, b - 3, c - 1
  4. a - 2, b - 1, c - 3
  5. a - 1, b - 2, c - 3
Question 5 Multiple Choice (Single Answer)

Which of the following is an example to prove that hot air rises upwards and cold air sinks down?

  1. The rising up of smoke when someone burns a heap of dry leaves
  2. The blowing off of the roofs in high-speed winds
  3. The taking off of a moving aeroplane on a runway
  4. The fluttering of flags in moving air
  5. The falling off of leaves in strong winds
Question 6 Multiple Choice (Single Answer)

The air in the southern hemisphere blows in the __________ direction.

  1. West-East
  2. South-West
  3. North-South
  4. South-North
  5. North-West
Question 7 Multiple Choice (Single Answer)

Match the following:

 
Countries Name of high-speed winds
a. West Indies 1. Willy-willies
b. China 2. Hurricanes
c. Australia 3. Typhoons
  1. a - 2, b - 3, c - 1
  2. a - 2, b - 1, c - 3
  3. a - 1, b - 2, c - 3
  4. a - 3, b - 2, c - 1
  5. a - 1, b - 3, c - 2
Question 8 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. All storms are low pressure systems.
b. Destructive capacity of a wind storm increases with the decrease in wind speeds.
c. A hurricane dies out only when it moves over the land mass.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 9 Multiple Choice (Single Answer)

A thunderstorm is caused by violent air currents inside the ___________ clouds.

  1. cirrus
  2. altocumulus
  3. cumulus
  4. cirrostratus
  5. altostratus
Question 10 Multiple Choice (Single Answer)

In India, in the months of ____________, the Sun shines equally on water and land mass.

  1. February and March
  2. May and June
  3. September and October
  4. December and January
  5. November and December
Question 11 Multiple Choice (Single Answer)

Which of the following is not an example to prove that moving air exerts pressure?

a. When one flies a kite, the air is always blowing from the direction in which one's back is facing.
b. While riding a bicycle, if the wind is blowing opposite to the direction of bicycle, it is easier to drive.
c. While rowing a sail boat, it is always easier to row it in the direction of wind.

  1. Only a
  2. Both a and b
  3. Only b
  4. Both b and c
  5. Only c
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. The rubbing of water and ice particles builds up a positive electric charge in the clouds.
b. A hurricane is a deep depression with high powered circular winds.
c. Hurricanes never originate on the land mass, but often penetrate the margins of continents.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 13 Multiple Choice (Single Answer)

Which of the following is not a precaution to be taken during a thunderstorm?

  1. Do not take shelter under an umbrella with a metallic rod.
  2. Do not stand erect or lie flat on the ground.
  3. Take shelter under a big tree or a high rise building.
  4. Do not sit near a window, open garage or a storage shed with tin roof.
  5. Take shelter in a bus or a car.
Question 14 Multiple Choice (Single Answer)

Hurricanes develop over the oceans in latitudes

  1. 8 degree to 15 degree East and West
  2. 15 degree to 30 degree North and South
  3. 7 degree to 9 degree North and South
  4. 8 degree to 15 degree West and South
  5. 8 degree to 15 degree North and South
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