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Air Test - 4

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Air Test - 4
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following is the unit of Atmospheric pressure?
    Solution
    • Bars are the unit of pressure hence C is the correct option.
    • Calorie is the unit of energy
    • Newton is the unit of force.
    • Watt is the unit of power.
  • Question 2
    1 / -0
    What is the upper part of the atmosphere called?
    Solution
    The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at the top of the thermosphere at an altitude of about 700 km above sea level, to about 10,000 km (6,200 mi; 33,000,000 ft) where it merges into the solar wind.
  • Question 3
    1 / -0
    The horizontal movement of air is called ________.
    Solution
    Wind is defined as the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction whereas breeze is the gentle wind.
  • Question 4
    1 / -0
    Which of the following gases protects us from harmful sun rays?
    Solution
    Ozone is an inorganic molecule which is formed by three atoms of oxygen. It is an allotrope of oxygen. Ozone protects us from harmful sun rays. It is present in ozonosphere region of stratosphere. Ozone layer absorbs dangerous UV radiation from sun rays. It protects us from skin cancer and other health damage. However, ozone layer is depleting due to harmful gases like CFCs, i.e. Chlorofluorocarbons.
  • Question 5
    1 / -0
    Which of the following layers is free from clouds?
    Solution
    Stratosphere lies below the  Troposphere . It extends up to a height of 50 km. This layer is almost free from clouds and associated weather phenomenon, making conditions most ideal for flying planes or jets.
    The correct answer is C .
  • Question 6
    1 / -0
    Read the following statements:
    i. Ozone is found mostly in the stratosphere
    ii. Ozone layer lies 55-75 km above the surface of the earth.
    iii. Ozone absorbs ultraviolet radiation from the Sun.
    iv. Ozone layer has no significance for life on the earth.
    Which set of the statements is correct?
    Solution

    Stratosphere

    The Ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth. The ozone layer absorbs 97 to 99 percent of the Sun's medium-frequency ultraviolet light.

  • Question 7
    1 / -0
    Cyclones become very destructive in area of Bay of Bengal during early November because of _________.
    Solution
    During winter season land areas become cold and adjoining ocean surface becomes comparatively hot. So low-pressure centers develop in the ocean and the winds started blowing from surrounding high pressure to low pressure areas. As it comes to the low-pressure center, it gets warm and rises up. For this mechanism, devastating cyclones originated in the Bay of Bengal during October to early November.
  • Question 8
    1 / -0
    The average temperature of the Earth remains fairly steady as compared to that of the Moon because of the _________.
    Solution
    The average temperature of the Earth remains fairly steady as compared to that of the Moon because of the atmosphere. The atmosphere is a mixture of numerous gases. This gaseous cover of the earth is held around it by gravitational attraction. It acts like a greenhouse and maintain the average temperature and protect us from harmful radiations of the Sun.
  • Question 9
    1 / -0
    Which one of the following statement is correct?
    Solution
    Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere.

  • Question 10
    1 / -0
    The hot and dry local wind blowing in the northern plains in summer is known as
    Solution
    The wind blowing in the northern plains in summer is known as loo. Loo is a very strong hot and dry summer afternoon wind which blows over the western-indogangetic plain region of north india and pakistan. It mainly occurs in the month of may and june. Due to its high temperature and extremely low humidity it has severe adverse effect on health causing heat stroke and on vegetation causing brawning in the affected areas.
    The correct answer is C.
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