Stars – MCQs

1. What is a star?

• A luminous ball of gas, mostly hydrogen and helium
• A rocky celestial body
• A frozen ice ball
• A man-made satellite

2. Which is the closest star to Earth?

• Alpha Centauri
• The Sun
• Sirius
• Betelgeuse

3. What is the main process by which stars produce energy?

• Nuclear fission
• Nuclear fusion
• Chemical combustion
• Gravitational collapse

4. Which color indicates the hottest star?

• Red
• Yellow
• Blue
• White

5. Which star is known as the “North Star” or Pole Star?

• Sirius
• Polaris
• Vega
• Betelgeuse

6. Which star is known as the “Evening Star” or “Morning Star”?

• Sirius
• Venus (often mistaken as a star)
• Polaris
• Betelgeuse

7. What is the main element in stars?

• Hydrogen
• Oxygen
• Carbon
• Iron

8. What is our Sun classified as?

• Red giant
• White dwarf
• Yellow dwarf
• Neutron star

9. What remains after a supernova?

• Black hole
• Neutron star
• White dwarf
• Both black hole and neutron star

10. Which is the brightest star in night sky?

• Polaris
• Sirius
• Vega
• Betelgeuse

11. What is a group of stars called?

• Constellation
• Galaxy
• Solar system
• Nebula

12. What determines a star’s lifespan?

• Size
• Color
• Distance from Earth
• Rotation speed

13. What is the approximate surface temperature of the Sun?

• 1,000°C
• 5,500°C
• 5,500°C (or ~5,500 Kelvin)
• 15,000°C