quiz

Stellar Formation and Life Cycle of a Star

The Formation and Evolution of Stars

1. What is the predominant gas involved in star formation?

  • A) Helium
  • B) Hydrogen
  • C) Oxygen
  • D) Nitrogen
B) Hydrogen Explanation

2. A young newly formed star is called:

  • A) Main sequence star
  • B)  Red giant star
  • C) T Tauri star
  • D)  Neutron star  
C) T Tauri star Explanation

3. What is the immediate product of the star formation process?

  • A) Interstellar medium
  • B) Giant molecular clouds
  • C) Protostars
  • D) Star clusters
C) Protostars Explanation

4. Where do stars primarily form from gas and dust in space?

  • A) Black holes
  • B) Interstellar clouds or nebulae
  • C) Planetary systems
  • D) Asteroid belts
B) Interstellar clouds or nebulae Explanation

5. How long is our Sun expected to stay in its mature phase on the main sequence?

  • A) 1 million years
  • B) 1 billion years
  • C) 10 billion years
  • D) 100 billion years
C) 10 billion years Explanation

6. Which object is classified as a Class 0 protostar?

  • A) MWC 349
  • B) VLA 1623
  • C) 3MM-1
  • D) GCIRS 8*
B) VLA 1623 Explanation

7. What is the final stage in the life cycle of a high-mass star?

  • A) White dwarf Stage
  • B) Planetary Nebula Stage
  • C) Red giant Stage
  • D) Neutron Star or Black Hole Stage
D) Neutron Star or Black Hole Stage Explanation

8. Which nebula is the closest and visible to the naked eye in the night sky?

  • A) Horsehead Nebula
  • B) Crab Nebula
  • C) Orion Nebula
  • D) Helix Nebula
C) Orion Nebula Explanation

9. What is the primary cause of H II regions in interstellar space?

  • A) Gravitational collapse of gas clouds
  • B) Supernova explosions
  • C) Ionization by ultraviolet radiation from hot stars
  • D) The age of the molecular cloud
C) Ionization by ultraviolet radiation from hot stars Explanation

10. Which of the following stars is an example of a high-mass star?

  • A) Alpha Centauri A
  • B) Sirius A
  • C) Betelgeuse
  • D) Rigel
D) Rigel Explanation

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