solar system

   August 5, 2022
1.

Consider the following about solar flares and coronal mass ejections (CMEs):

  1.  A CME can jostle Earth’s magnetic fields creating currents that drive particles down towards Earth’s poles.
  2. Both eruptions are created when the motion of the Sun’s interior contorts its own magnetic fields.
  3. While solar flares involve huge explosions of energy, CMEs involve formation of energy suctions in space that consume energy from its surroundings.
  4.  CMEs travel at the speed of light, solar flares do not.

Select the correct answer using the codes below:

2. Earth’s orbital velocity around the Sun varies with
3. When the Earth crosses the tail of a comet, it indicates
4. Consider the following statements:
  1. Sunspots are temporary phenomena on the photosphere of the Sun.
  2. They appear visibly as bright spots compared to surrounding regions.
  3. They may affect the climate on Earth by changing the solar output received by Earth.
Select the correct answer using the codes below:
5. Consider the following about ‘fast radio burst’, recently seen in news:
  1. They are found in parts of the sky outside the Milky Way galaxy.
  2. They last for several years but felt on Earth for a very short duration of time.
Which of the above is/are correct?
6. With reference to coronal explosions, consider the following:
  1. It produces large radiations and particles which may significantly influence the atmosphere of the star.
  2. It has been observed only in the Sun.
  3. If the flare from such an explosion reaches Earth, it can damage electrical equipment and power grids.
Select the correct answer using the codes below:
7. Consider the following statements:
  1. Ursa Major constellation is most clearly visible from Southern Hemisphere as against a partial obstruction from Northern Hemisphere.
  2. Pole Star is a rough indicator of the direction towards the geographic North Pole.
Which of the above is/are correct?
8. With reference to planets of the Solar System and their orbital characteristics, consider the following matches:
  1. Uranus: Made entirely of rocks
  2. Saturn: Longest spin time on own axis
  3. Mars: Highest number of moons
  4. Mercury: Shortest orbital period around Sun
Select the correct answer using the codes below:
9. Consider the following statements:
  1. In the Solar System planets, only Jupiter and Saturn have rings around them.
  2. The rings surrounding the Solar System are large enough to be visible from naked eyes.
Which of the above is/are correct?
10. As meteoroids come near the Earth and tend to drop upon it, we often see a flash of light. This is caused due to