Hertzsprung-Russell diagram and stellar life cycle Quiz
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5 questions, one answer each
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1. Which feature of the horizontal axis of an HR diagram is unusual?
- A. It is logarithmic
- B. Temperature increases from right to left
- C. It shows mass
- D. It shows age
2. A star is cool and very luminous. Where does it lie on the HR diagram?
- A. Top right
- B. Bottom left
- C. Top left
- D. Bottom right
3. What is the final remnant of a star like the Sun?
- A. Neutron star
- B. Black hole
- C. Red supergiant
- D. White dwarf
4. Two stars have the same surface temperature, but star A has a much greater luminosity than star B. What can be deduced?
- A. A is cooler than B
- B. A has a smaller surface area than B
- C. A has a larger surface area than B
- D. A and B have the same size
5. Why does a star of 15 solar masses spend less time on the main sequence than the Sun?
- A. It has less hydrogen
- B. It fuses hydrogen at a much greater rate
- C. Its core is cooler
- D. It has no outward pressure