Exam-style question
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What is the main sequence in the context of the Hertzsprung-Russell diagram?.
- A.A group of stars that are all the same temperature.
- B.The stage where stars fuse hydrogen into helium.
- C.A classification of stars based on their distance from Earth.
- D.The final stage of a star's life cycle.
Model answer
What a good answer should say
- The stage where stars fuse hydrogen into helium.
Explanation
Why this works
The main sequence is the phase in a star's life where it fuses hydrogen into helium in its core, representing the majority of a star's life cycle on the Hertzsprung-Russell diagram.
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