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Wind, Air Pressure and Atmospheric Phenomena - Class VII

Questions about sea and land breezes, monsoon winds, convection currents, air pressure, and effects of uneven heating of the Earth

26 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Convectional currents are set up, giving rise to :

  1. Land breezes
  2. Land clean
  3. Sea water heated up
  4. None
Question 2 Multiple Choice (Single Answer)

Sea breeze blows

  1. During day
  2. During night
  3. Throughout day and night
  4. None of these
Question 3 Multiple Choice (Single Answer)

Ocean thermal energy is due to 

  1. temperature difference at different levels in the ocean
  2. tides in the ocean
  3. energy stored by the water waves
  4. pressure different at different levels in the ocean
Question 4 Multiple Choice (Single Answer)

Wind currents are generated due to:

  1. Uneven heating between the equator and the poles
  2. Change in atmospheric pressure
  3. Thunderstorm
  4. Cyclone
Question 5 Multiple Choice (Single Answer)

During day time air blows-

  1. from the land to the sea
  2. from the sea to the land
  3. from one sea to another
  4. none of these
Question 6 Multiple Choice (Single Answer)

During night time cool breeze blows from____to _____

  1. land, sea
  2. sea,land
  3. mountain,land
  4. land,mountain
Question 7 Multiple Choice (Single Answer)
State whether given statement is True or False
During the night, land cools faster than sea.
  1. True
  2. False
Question 8 Multiple Choice (Single Answer)

Which of the following constitutes a wind energy 

  1. Sea breeze
  2. Land Breeze
  3. Both A and B
  4. none of these
Question 9 Multiple Choice (Single Answer)

Which of the following is an example of mode of transport making use of air pressure ?

  1. Sailing boat in an ocean
  2. Rowing boat on a windy day
  3. Aeroplane in a sky
  4. All the above
Question 10 Multiple Choice (Single Answer)

What affects the direction of kite in the sky ?

  1. Motion of bird in the sky
  2. Clouds in the sky
  3. Wind blowing in the sky
  4. Other kites around it
Question 11 Multiple Choice (Single Answer)

Which of the following is not an example of air exerting pressure ?

  1. Pressing the brakes of a bicycle.
  2. Filling up the bicycle tube with air
  3. Riding bicycle against the flow of wind
  4. Playing with the kite
Question 12 Multiple Choice (Single Answer)

Which of the following can be described as convection current

  1. Sea Breeze and land Breeze
  2. Heat transfer from one end to another in a metal rod
  3. Sun's radiations
  4. None of these
Question 13 Multiple Choice (Single Answer)

Which of the following are caused by wind ?

  1. The rotation of windmills
  2. Swinging of flowers
  3. Fluttering of the flags
  4. All of the above
Question 14 Multiple Choice (Single Answer)

Which source of energy makes use of the air pressure in generation of energy ?

  1. Hydroelectric Power plant
  2. Nuclear reactor
  3. Windmill
  4. Thermal power plant
Question 15 Multiple Choice (Single Answer)

A strip of paper is held between thumb and finger. If we blow over the paper, what will happen to the paper strip ?

  1. The paper strip will be lifted up
  2. The paper strip will bend down
  3. The paper strip will oscillate up and down alternately
  4. None of the above
Question 16 Multiple Choice (Single Answer)

An experiment is conducted to understand air pressure. Two identical balloons are filled with little water and blown. Then they are tied to a string some distance apart. What happens when air is blown in between them ?

  1. They move closer to each other.
  2. They move further apart.
  3. One moves up and other moves down
  4. none of the above
Question 17 Multiple Choice (Single Answer)

How are monsoon winds formed?

  1. The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land, which gives rise to Monsoon winds.
  2. The pressure difference in adjoining areas gives rise to air movement which leads to formation of Monsoon winds
  3. Air that is warmed up near the Equator, moves towards each pole causing the Monsoon winds to blow.
  4. None of the above
Question 18 Multiple Choice (Single Answer)

What is the direction of Monsoon winds in Summer ?

  1. From ocean towards the land
  2. From land towards the ocean
  3. From equator towards the poles
  4. From poles towards the equator
Question 19 Multiple Choice (Single Answer)

Why do the polar winds not move in exact North-South direction ?

  1. The revolution of the earth affects the direction of the winds.
  2. The rotation of the earth affects the direction of the winds.
  3. The Other air currents in the atmosphere change the direction of the polar winds.
  4. None of these
Question 20 Multiple Choice (Single Answer)

What is the direction of Monsoon winds in winter ?

  1. From oceans to land
  2. From land to oceans
  3. From equator to poles
  4. From poles to equator
Question 21 Multiple Choice (Single Answer)

Which of the following is not true about the formation of winds due to uneven heating of land at Equator and Polar regions ?

  1. The winds blow from the $0-30^o$ latitudes, taking place of the warm air at the equator that has risen up, towards the equator and constitute the Polar winds.
  2. The cool air at the poles rushes in to take place of the warmer winds in the $60^o$ belt and constitute the Polar winds.
  3. The winds of the wind is not exactly in the North-South direction because of the rotation of the Earth.
  4. The pressure difference between the equatorial and polar regions leads to the formation of winds in the North-South direction
Question 22 Multiple Choice (Single Answer)

What is the importance of Monsoon winds ?

  1. They lower the temperature of areas where temperature is usually high.
  2. They bring rain and play important role in water cycle.
  3. They clear up the sky and make atmosphere sunny.
  4. None of the above
Question 23 Multiple Choice (Single Answer)

Which area on the Earth receives maximum sunlight ?

  1. Polar region
  2. Equatorial region
  3. Along the latitude of Tropic of Cancer
  4. Along the latitude of Tropic of Capricorn
Question 24 Multiple Choice (Single Answer)

What is the basis for the formation of winds due to heating of different areas on Earth ?

  1. The air in cold temperature regions gets cooled, expands and becomes more dense and rises up. It's place is taken by heavier air from adjacent regions.
  2. The air in cold temperature regions gets cooled up, expands and becomes less dense and rises up. It's place is taken by heavier air from adjacent regions.
  3. The air in high temperature regions gets heated up, expands and becomes less dense and rises up. It's place is taken by heavier air from adjacent regions.
  4. The air in high temperature regions gets heated up, contracts and becomes more dense and rises up. It's place is taken by heavier air from adjacent regions.
Question 25 Multiple Choice (Single Answer)

At poles, how is the direction of Polar winds ?

  1. Air from Polar region moves in towards the $60^o$ latitude belt
  2. Air from the $60^o$ latitude belt moves in towards Polar region
  3. Air from Polar region moves in towards the equatorial region
  4. Air from equatorial region moves in towards the Polar region
Question 26 Multiple Choice (Single Answer)

Arrange the following steps in the proper order to explain how a sea breeze occurs, near coastal regions.
(a) The temperature of land rises rapidly as compared to sea, because the specific heat capacity of land is five times less than that of water.
(b) Due to the low pressure over the land mass, the cool air over the sea starts blowing towards the land.
(c) The sun shines equally on the land mass and sea, giving equal amount of heat energy to both.
(d) The air above the land becomes hot and light, rises up and hence creates the low pressure over the land.

  1. a d c b
  2. c d a b
  3. c a b d
  4. c a d b
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