Stars and their life cycle Quiz
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5 questions, one answer each
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1. Which process releases energy in the core of a main-sequence star?
- A. Nuclear fission of uranium
- B. Burning of hydrogen in air
- C. Nuclear fusion of hydrogen into helium
- D. Radioactive decay
2. What does a star like the Sun become after the red giant stage?
- A. A white dwarf
- B. A black hole
- C. A neutron star
- D. A protostar
3. Which star is most likely to end as a supernova?
- A. A star the size of a planet
- B. A star with half the Sun's mass
- C. A star of exactly the Sun's mass
- D. A star much more massive than the Sun
4. Where are elements heavier than iron mainly formed?
- A. In the core of the Sun
- B. In supernova explosions
- C. In nebulae
- D. On the surface of planets
5. Why does a main-sequence star not collapse under its own gravity?
- A. It has no mass
- B. It is too far from other stars
- C. The outward pressure from fusion balances gravity
- D. The nebula is still around it