What is the CNO cycle?
A) the set of fusion reactions that have produced all the carbon, nitrogen, and oxygen in the universe
B) the process by which helium is fused into carbon, nitrogen, and oxygen
C) the process by which carbon is fused into nitrogen and oxygen
D) a set of steps by which four hydrogen nuclei fuse into one helium nucleus
Correct Answer:
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Q83: What type of star is our Sun?
A)a
Q84: What happens when a main- sequence star
Q85: Helium fusion results in the production of
A)carbon.
B)nitrogen.
C)iron.
D)oxygen.
E)hydrogen.
Q86: What happens after the helium flash?
A)The star
Q87: Why does a star grow larger after
Q89: This diagram represents the life track of
Q90: Carbon fusion occur in high- mass stars
Q91: What is the CNO cycle?
A)the process by
Q92: What is a planetary nebula?
A)gas created from
Q93: Why is iron significant to understanding how
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