Author Question: When a star finally runs out of hydrogen to fuse in its central core A) it grows smaller and ... (Read 91 times)

FButt · **on:** Jul 27, 2018

When a star finally runs out of hydrogen to fuse in its central core

A) it grows smaller and dimmer, becoming a brown dwarf
B) it grows larger and brighter, becoming a giant or supergiant star
C) it grows smaller and dimmer becoming a white dwarf
D) it remains the same size but grows brighter

Question 2

What source of energy might keep an ocean beneath the surface of Callisto liquid?

A) tidal heating only
B) radioactive decay only
C) tidal heating and radioactive decay
D) heat released from a partially molten core