2. which of the following happens when a low - mass star runs out of fuel ? choose all that apply . ( 3points )
A ITS CORE BECOMES A WHITE DWARF
B ITS OUTER LAYERS FORM a nebula , or vast cloud of gas and dust
c its outer layers expand , and the star becomes a red giant
d. gas and dust in a nebula contract to form a protostar
A,B,C?
Yes it is A,B,and C
Yes your right i got all of them right on mine
When a low-mass star runs out of fuel, the following options apply:
A. Its core becomes a white dwarf.
C. Its outer layers expand, and the star becomes a red giant.
So the correct answers are A and C.
To determine which of the options apply when a low-mass star runs out of fuel, we need to understand the different stages of stellar evolution.
A. When a low-mass star runs out of fuel, its core becomes a white dwarf: This happens during the final stage of the life cycle of a low-mass star. After exhausting its nuclear fuel, the core contracts and becomes a dense, hot white dwarf.
B. When a low-mass star runs out of fuel, its outer layers form a nebula: This option is not accurate for a low-mass star. When larger and more massive stars run out of fuel, their outer layers can explode, creating a nebula called a supernova remnant. However, a low-mass star does not have enough mass to undergo a supernova explosion, so this option is not applicable.
C. When a low-mass star runs out of fuel, its outer layers expand, and the star becomes a red giant: This is the correct option. After burning all its hydrogen fuel in the core, a low-mass star enters the red giant phase. During this phase, the star's outer layers expand, causing it to become larger and cooler.
D. Gas and dust in a nebula contract to form a protostar: This option is not applicable to a low-mass star running out of fuel. The formation of a protostar occurs during the early stages of star formation when a nebula collapses under gravity, not after a star has exhausted its fuel.
In summary, the correct choices for a low-mass star running out of fuel are:
- Option A: Its core becomes a white dwarf.
- Option C: Its outer layers expand, and the star becomes a red giant.
Therefore, the correct answer is A and C.