____________ 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. 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...

3. Second layer of Earth’s atmosphere is__________?

   A. Stratosphere B. Mesosphere C. Troposphere D. Thermosphere Submitted by: Rehana Mallah...

4. The earth’s atmosphere is divided into layers based on the vertical profile of __________?

   A. Air pressure B. Air temperature C. Air density D. Wind speed Submitted by: Mansoor Ul Haque...

5. 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)...

6. 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...

7. The process by which air flows from one location in the atmosphere to another is called __________?

   A. Convection  B. Radiation C. Conduction D. Electromagnetic Induction Submitted by: Rida...

8. Most of the weather phenomena take place in which of the following layers of the atmosphere?

   A. Mesosphere B. Ionosphere C. Stratosphere D. Troposphere Submitted by: Mansoor Ahmed Suhag...

9. Our atmosphere comprises of __________ Nitrogen?

   A. 38% Nitrogen B. 58% Nitrogen C. 78% Nitrogen  D. None of these Submitted by: Ameer Ali Mirani...

10. As we go higher into the atmosphere, the air becomes?

    A. Thinner B. Denser C. Warmer D. Visible Submitted by: Syed Nizakat Ali Shah...