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Home Practice Questions Astronomy NYS Earth Science Regents Review Practice - Astronomy - Question 17
NYS Earth Science Regents Review Practice - Astronomy - Question 17 PDF Print E-mail
Written by The Earth Science Wizard   
Monday, 16 November 2009 13:36

17. Which star’s surface temperature is closest to the temperature at the boundary between Earth’s mantle and core?

A) Sirius

B) The Sun

C) Rigel

D) Betelgeuse

Correct Answer: Option B – The Sun

The resulting temperature at the core-mantle boundary of about 4000 K then requires a large temperature gradient at the bottom of the lower mantle of about 1500 K.

Sun has a surface temperature of 5,778 K.

Incorrect Options

• Betelgeuse has a surface temperature of 3,500 K.

• Sirius has a surface temperature of 25,200 K.

• Rigel has a surface temperature of 11,000K.
 

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