Question

part 2: multiple choice

1. which star type has the longest overall lifespan?

a sun - like star
b red giant
c red dwarf
d massive star

1. a planetary nebula is formed from

a the remains of a low - mass red dwarf
b the explosion of a massive star
c the outer layers of a red giant
d gas pulled into a black hole

1. which of the following has the shortest lifespan according to the diagram?

a red dwarf
b sun - like star
c massive star
d protostar

1. the explosion that marks the end of a massive stars life is called a

a planetary nebula
b supernova
c protostar
d red giant

Explanation:

1. Red dwarfs have the longest lifespan due to their low - mass and slow rate of nuclear fusion.
2. A planetary nebula is formed from the outer layers of a red giant as it sheds its outer material.
3. Massive stars have the shortest lifespan because they burn through their fuel very quickly due to high mass and high core temperatures.
4. The explosion that marks the end of a massive star's life is called a supernova.

Answer:

1. C. Red dwarf
2. C. The outer layers of a red giant
3. C. Massive star
4. B. Supernova