Comets are made mostly of ice and dust. As comets get close to the sun, they start to “melt” and release what?

Related Mcqs:

1. As comets get close to the sun, they start to “melt” and release gas and dust. This gas and dust forms what?

   A. “coma” around the comet’s nucleus and a long tail that points away from the sun
   B. “coma” that points away from the sun and a long tail around the comet’s nucleus
   C. Only “coma” around the comet’s nucleus
   D. Only a long tail that points away from the sun

   Submitted by: Muhammad Abdullah

2. During winter in cold countries, the __________ is mixed to melt the ice on the icy roads.

   A. Salt
   B. Chlorine
   C. Carbon dioxide
   D. Water

3. Comets are made mostly of ______________?

   A. Ice and dust
   B. Dust and lights
   C. Ice, dust and lights
   D. All of the above

   Submitted by: Muhammad Abdullah

4. The snow on the mountains does NOT melt all at once when it is heated by the sun because:

   A. it becomes very hard
   B. it reflects most of the heat from the sun
   C. it has a low specific heat capacity
   D. it has a high latent heat of fusion

   Submitted by: Abid Hussain

5. As the temperature of ice rises, the ice melts and its density?

   A. Decreases
   B. Remain constant
   C. Increases
   D. Increases upto 10C

   Submitted by: Ashfaque Ali Khoso

6. The ice giants are mostly made of ‘volatile’ substances such as?

   A. Water, mercury and methane
   B. Water, ammonia and mercury
   C. Water, plasma and methane
   D. Water, ammonia and methane

   Submitted by: Muhammad Abdullah

7. NASA’s _________ is currently studying the sun up close.

   A. Darker Solar Probe
   B. Walker Solar Probe
   C. Parker Solar Probe
   D. Falkner Solar Probe

   Submitted by: Muhammad Abdullah

8. Earth is closest to the sun every year in early ______________, when it’s winter for the Northern Hemisphere. We’re farthest away from the sun in early __________________, during our Northern Hemisphere summer.

   A. January – July
   B. June – December
   C. July – January
   D. December – June

   Submitted by: Mansoor Ul Haque

9. When in the part of its orbit closest to the Sun, Pluto has an atmosphere of nitrogen and methane similar to Triton’s, but what happens when it is farther from the Sun ?

   A. These gases are not present
   B. These gases are like plasma
   C. These gases are frozen 
   D. These gases are volatile

   Submitted by: Muhammad Abdullah

10. The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids.

    A. Mars
    B. Saturn
    C. Uranus
    D. Jupiter