The principal constituent of the atmosphere of the Earth is?

Related Mcqs:

1. About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is?

   A. Oxygen
   B. Cabon Dioxide
   C. Silicon
   D. Clay

2. The lowest region of the earth’s atmosphere comes between the earth and stratosphere. what is this region’s name?

   A. Ionosphere
   B. Troposphere 
   C. Stratosphere
   D. Mesosphere

   Submitted by: Ashfaque Ali Khoso

3. The sky appears blue because the earth’s atmosphere __________?

   A. Scatters blue light
   B. Reflects blue light
   C. Transmits blue light
   D. Has actual blue cover

4. Which among the following is the correct sequence of the various layers of the Atmosphere from the Earth’s surface?

   A. Ionosphere, Mesosphere, Stratosphere, Troposphere
   B. Mesosphere, Stratosphere, Ionosphere, Troposphere
   C. Troposphere, Stratosphere, Mesosphere, Ionosphere
   D. Troposphere, Ionosphere, Stratosphere, Mesosphere

   Submitted by: ★ ɪʟʏᴀsɪʟᴜ ★

5. Second layer of Earth’s atmosphere is__________?

   A. Stratosphere
   B. Mesosphere
   C. Troposphere
   D. Thermosphere

   Submitted by: Rehana Mallah

6. The atmosphere near the earth’s surface is “heated from below.” Which of the following does not significantly contribute to this heating _____________________?

   A. Conduction of heat upward from a hot surface
   B. Convection from a hot surface
   C. Absorption of infrared energy that has been radiated from the surface
   D. Heat energy from the earth’s interior

   Submitted by: Mansoor Ul Haque

7. The top atmosphere of the Earth directly reflects back into space nearly what part of the total amount of sun’s energy coming to it?

   A. 10%
   B. 20%
   C. 30%
   D. 50%

   Submitted by: Jameel Ahmed Solangi (Larkana)

8. What prevents the earth’s atmosphere from drifting away into space?

   A. Gravity
   B. Ozone layer
   C. Troposphere
   D. Ecosystem

   Submitted by: Ashfaque Ali Khoso

9. Which layer of the atmosphere reflects radio waves back to the earth’s surface?

   A. Troposphere
   B. Stratosphere
   C. Ozone layer
   D. Ionosphere

   Submitted by: Aamir Hussain Laghari

10. The coldest region of the Earth’s atmosphere is__________?

    A. Exosphere
    B. Thermosphere
    C. Stratopause
    D. Mesopause

    Submitted by: Fida Ur Rasool