____________ contains 75–80 % of the mass of the atmosphere.

Related Mcqs:

1. Acid rain is mainly caused by emissions of __________ in the atmosphere?

   A. Sulfur Dioxide and Potassium Nitrate
   B. Sulfur and Charcoal
   C. Nitrogen Oxide and Potassium Nitrate
   D. Sulfur Dioxide and Nitrogen Oxide

2. 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

3. A lake starts freezing because of the cold atmosphere. It will first freeze

   A. At the bottom
   B. ln the middle pan
   C. At the top surface
   D. Uniformly throughout the water body

4. You have discovered a new celestial body. It has a thick atmosphere and it produces powerful cosmic winds and, when observed, the clouds obscure the body. You have determined it is this type of star.

   A. Wolf-Rayet star
   B. Red supergiant
   C. Stellar storm
   D. Pulsar

   Submitted by: Mansoor Ul Haque

5. 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

6. Which is the most abundant element in the atmosphere?

   A. Nitrogen
   B. Hydrogen
   C. Nickle
   D. Oxygen

   Submitted by: Arsalan hashmi

7. 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

8. Coldest point in atmosphere is?

   A. Tropopause
   B. Mesopause
   C. Exopause
   D. None of these

   Submitted by: Fazal Manan Safi

9. The unit to measure the quantity of Ozone in atmosphere is ?

   A. Dobson
   B. Cloning
   C. Dalton
   D. Colomb

   Submitted by: Mansoor Ahmed Suhag

10. Which of the following noble gases is not present in atmosphere?

    A. Argon
    B. Helium
    C. Radon
    D. Xenon

    Submitted by: Malik Asghar Hussain