___________ begins at 690 to 1,000 km from the surface, and extends to roughly 10,000 km.

Related Mcqs:

1. Exosphere interacts with ___________ of Earth at roughly distance of 10,000 km.

   A. Electrosphere
   B. Magnetosphere
   C. Spectrosphere
   D. Echosphere

   Submitted by: Muhammad Abdullah

2. Troposphere extends from planetary surface to bottom of __________?

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

   Submitted by: Muhammad Abdullah

3. _________ extends from the top of the troposphere to the bottom of the mesosphere.

   A. Thermosphere
   B. Ionosphere
   C. Stratosphere
   D. None of the above

   Submitted by: Muhammad Abdullah

4. The thermosphere extends from an altitude of ________ to the base of ________ at ________?

   A. 75 km, Mesosphere, 670 km
   B. 80 km, Ionosphere, 680 km
   C. 85 km, Exosphere, 690 km
   D. 90 km, Ozone Layer , 690 km

   Submitted by: Muhammad Abdullah

5. The sun’s surface is called ___________?

   A. Cromosphere
   B. Leutosphere
   C. Thermosphere
   D. Photosphere 

   Submitted by: Muhammad Abdullah

6. Water covers __________ of the Earth’s surface?

   A. 61%
   B. 67%
   C. 71%
   D. 76%

7. Place directly above focus on Earth’s surface is known as _________?

   A. Strike
   B. Comma
   C. Epicenter
   D. Origin

   Submitted by: Rashid Mehmood

8. What is the percentage of salt water on earth surface?

   A. 93%
   B. 95%
   C. 97% 
   D. 76%

   Submitted by: Syed Nizakat Ali Shah

9. The moon’s surface is constantly bombarded by?

   A. Comets
   B. UV light
   C. Meteoroids
   D. All of the above

   Submitted by: Muhammad Abdullah

10. _________ is the layer wherein most meteors are incinerated before reaching the surface.

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

    Submitted by: Muhammad Abdullah