Weegy: The color of a star is primarily determined by its SURFACE TEMPERATURE.
User: The Sun is expected to undergo hydrogen fusion for a total of _____ years.
a million
10 million
a billion
10 billion
100 billion
Weegy: The Sun is expected to undergo hydrogen fusion for a total of 10 billion years.
User: The longest-lived stars are expected to undergo fusion reactions for _____ years.
a thousand
a million
a billion
a trillion
thousands of trillions of
Weegy: The longest-lived stars are expected to undergo fusion reactions for a billion years.
User: Which of the following statements describes the relationship between mass and the expected lifetime of a star?
Larger stars undergo fusion reactions for longer periods than small stars.
Medium-sized stars undergo fusion reactions for longer periods than larger or smaller stars.
Smaller stars undergo fusion reactions for longer periods than large stars.
A star's mass has no effect on how long it will undergo fusion reactions.
Weegy: Smaller stars undergo fusion reactions for longer periods than large stars. This describes the relationship between mass and the expected lifetime of a star.
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