Choose from the list below for the following questions.You may use a choice more than once.
-Which method of energy generation is used by the Sun today?
A)H fusion by the proton-proton chain
B)H fusion by the CNO cycle
C)helium fusion
D)matter-antimatter annihilation
E)gravitational contraction

Question

Quizplus · Accepted Answer

The Sun currently generates energy through the proton-proton chain, which involves the fusion of hydrogen nuclei (protons) to form helium, releasing energy in the process. This is the dominant process in stars like the Sun, which have relatively low masses.

Answer: B
 The CNO cycle is another process of energy generation through nuclear fusion that occurs in stars with higher masses than the Sun. This process involves the conversion of carbon, nitrogen, and oxygen into other elements, releasing energy in the process.

Answer: E
 Gravitational contraction is the process by which a star initially generates energy as it forms from a cloud of gas and dust. However, this process is not sustainable in the long term, and stars eventually need to switch to nuclear fusion as their main source of energy generation.

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