Question

1. choose a for average star or m for massive star.

• at the end of life, it can become a neutron star.
• at end of life, it expands into a red giant and can become a white dwarf or planetary nebula.
• at the end of life, it expands into a red supergiant and explodes into a supernova.
• it has a life span of billions of years
• it has a lifespan of millions of years

Explanation:

1. "At the end of life, it can become a neutron star." - Massive stars (M) end as neutron stars (or black holes), average stars (A) don't. So M.
2. "At end of life, it expands into a red giant and can become a white dwarf or planetary nebula." - Average stars (A) follow this path (red giant → white dwarf/planetary nebula). So A.
3. "At the end of life, it expands into a red supergiant and explodes into a supernova." - Massive stars (M) become red supergiants and supernova. So M.
4. "It has a life span of billions of years." - Average stars (A) live billions of years, massive (M) live millions. So A.
5. "It has a lifespan of millions of years." - Massive stars (M) live millions of years, average (A) live billions. So M.

Answer:

1. M
2. A
3. M
4. A
5. M