A High-Mass Star Goes Through Many Fusion Cycles in Its

question 152

Multiple Choice

A high-mass star goes through many fusion cycles in its lifetime: hydrogen,helium,carbon,neon,oxygen,and silicon.How does the timescale for each cycle compared with the previous one?

• A) Each new nucleus is heavier than the previous one and thus it moves more slowly. Each successive stage therefore takes longer than the previous one.
• B) The temperature is higher at each stage and the number of nuclei to react fewer. Thus, each stage takes a shorter time than the previous one.
• C) 2 M to 8 M only
• D) all stars 0.4 M to 8 M

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