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Winds, Storms and Cyclones Test - 5

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Winds, Storms and Cyclones Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Increased wind speed is accompanied by
    Solution
    Wind always moves from a region of higher pressure to that of lower pressure. When it leaves a place of high pressure, low pressure is created in that region. Therefore, an increased wind speed is always accompanied by reduced air pressure.
  • Question 2
    1 / -0
    What is the name given to the swift movement of the falling water droplets along with rising air that creates lightning and sound?
    Solution
    The swift movement of falling water droplets along with rising air creates lightning and sound which is known as thunderstorm.
  • Question 3
    1 / -0
    What is the wind speed in the cloudy region at the centre of a cyclone?
    Solution
    The centre of a cyclone is a calm area called the eye of the storm. Its diameter is about 10-30 km. This region is free of clouds and has light winds. The speed of wind in this region is 150-250 km/h.
  • Question 4
    1 / -0
    Which of the following safety measures should be adopted by people living in coastal areas to protect themselves from a cyclone?
    Solution
    All of the above are necessary measures.
  • Question 5
    1 / -0
    Winds in the northern hemisphere swerve to the right and winds in the southern hemisphere swerve to the left because of
    Solution
    If the Earth did not rotate, wind would travel the globe in straight lines. Instead, the spin of the earth causes winds to seemingly curve to the right in the northern hemisphere and the left in the southern hemisphere.
    In the northern hemisphere, the strong trade winds that originate in the northeast and blow westward pull the surface of the ocean along with them near the equator.The warm-water current then heads north, turning at about 30 degrees north latitude. The westerlies take over then, completing the circuit. Blowing from the west, these winds guide the current eastward and south after they hit land.

    The two wind patterns create a continual circular pattern of wind flowing clockwise in the northern hemisphere and counterclockwise in the southern hemisphere.
  • Question 6
    1 / -0
    In an experiment, A holds the shortest end of paper just under his mouth and blows over the paper and the paper rises up. Which of the following conditions exists around the paper?
    Solution
    The air blown is moving faster on the upper side of the paper than the air under the paper. Greater is the speed, lesser is the pressure so there will be more pressure underneath the paper than on top. Hence, there will be net upward force on the paper so it will move upward.
  • Question 7
    1 / -0
    Ramesh filled his water bottle with hot water and closed its cap tightly. His bottle got distorted when he washed it with cold water. Which of the following is the correct reason behind this?
    Solution
    When boiled water is filled in the water bottle and its mouth is closed followed by cold water being poured over it, the bottle gets distorted. This happens because air inside the bottle gets condensed and creates low pressure. The high pressure from outside distorts the shape of the bottle.
  • Question 8
    1 / -0
    You have two balloons filled with water. They are tied at two ends of a stick with a string such that they do not touch each other, and there is very less space between them. When you blow in the space between the balloons, what will happen?
    Solution
    Balloons will come closer because pressure of air between the balloons is reduced as you blow air between them. The pressure on their outer sides is the atmospheric pressure which is higher than the air pressure between them. This higher air pressure pushes them towards each other.
  • Question 9
    1 / -0
    Where does a cyclone get its energy from?
    Solution
    Release of heat to the atmosphere when water vapours change back to liquid as raindrops is the main source of energy for a cyclone.
  • Question 10
    1 / -0
    A curtain is hanging at the entrance of a room. A long corridor runs at right angles to the door. If the strong wind blows along the corridor, the curtain will
    Solution
    If a strong wind blow along the corridor, then air pressure decreases outside the room. So, curtain gets pushed outside the room.
  • Question 11
    1 / -0
    During a cyclone in the northern hemisphere, air moves from a region of
    Solution
    Air always moves from a region of high pressure to low pressure.
    In a cyclone, wind moves anti-clockwise around a low pressure zone in the northern hemisphere, whereas in the southern hemisphere, wind moves in clockwise direction.
  • Question 12
    1 / -0
    Which of the following areas is/are best suited for formation of air masses?

    A. An extensive area with broadly uniform surface of earth.
    B. Areas having cyclones.
    C. Hot deserts in tropical regions.

    Select the correct answer using the codes given below.
    Solution
    Areas having cyclones have converging air flow and are therefore not suited for formation of air masses. Air masses are formed over an extensive area with broadly uniform surface of earth like hot desert region in tropical areas. Anticyclone over an area also helps in formation of air masses as they have divergent air flow.
  • Question 13
    1 / -0
    Consider the following statement about the North-East Monsoon in India

    A. They are retreating monsoon.
    B. They are responsible for rainfall along the Coromandel coast of India.
    C. They pick up moisture from the Bay of Bengal before rainfall.

    Which of the above statements are correct?
    Solution
    The North-East monsoon is the retreating monsoon in India. They move from land to the ocean and again from ocean to the land precipitating in South-eastern India.
  • Question 14
    1 / -0
    Which one of the following is NOT recommended during lightening or thunderstorm?
    Solution
    Taking shelter under isolated tree is not advised as it works as path for the lightening to ground and it can be fatal.
  • Question 15
    1 / -0
    Pick up the correct statement(s).

    A. A thunderstorm becomes a cyclone when a very high pressure is accompanied by low speed winds revolving around it.
    B. A gradual rise in air pressure indicates dry weather.
    C. The formation of cyclones depends upon the temperature and pressure.
    Solution
    The formation of cyclones depends upon the temperature and pressure.
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