Author Question: The energy of the Sun starts as radiation, but is actually transported to its surface by convection, ... (Read 50 times)

kshipps · **on:** Jul 27, 2018

The energy of the Sun starts as radiation, but is actually transported to its surface by convection, where it is radiated off into space at last.

Indicate whether the statement is true or false

Question 2

Which of the following describes a star with a hydrogen-burning shell and an inert helium core?

A) It is a red giant that grows in luminosity until it dies in a planetary nebula.
B) It is a subgiant that gradually grows dimmer as its hydrogen-burning shell expands and cools.
C) It is a subgiant that grows in luminosity until helium fusion begins in the central core.
D) It is what is known as a helium-burning star, which has both helium fusion in its core and hydrogen fusion in a shell.