Astro 7N Exam 2025/2026 Newest | Questions and100% Correct Answers with Rationales | (Updated & Graded A+)

Astro 7N Exam 2025/2026 Newest |

Questions and100% Correct Answers with Rationales |

(Updated

& Graded A+)

Detection of solar neutrinos confirms that




a. transport by radiation occurs throughout much of the

solar interior.

b. the Sun's core is powered by proton-proton fusion.

c. magnetic fields are responsible for surface activity on

the Sun.

,d. convection churns the base of the solar atmosphere. -

ANSWER-b. the Sun's core is powered by proton-proton

fusion.




In the proton-proton chain, the net reaction is that four

hydrogen nuclei are converted to one helium nucleus and

__________ are released.




a. ultraviolet photons and neutrinos

b. visible wavelength photons

c. gamma-ray photons and neutrinos

d. X-ray photons, electrons, and neutrinos - ANSWER-c.

gamma-ray photons and neutrinos

, How far out have the magnetic effects of the Sun been

directly measured?




a. out to Jupiter

b. out to Earth

c. out to Pluto

d. near the boundaries of interstellar space - ANSWER-d.

near the boundaries of interstellar space

The majority of the Sun's energy comes from




a. hydrogen fusion.

b. its rapid rotation.

c. gravitational contraction.

d. helium burning. - ANSWER-a. hydrogen fusion.