Unit 8: Stellar Evolution

Question 1

What properties do high mass stars have?

Answer 1

-Large radius
-High luminosity
-Bluer color
-Hotter

Question 2

What properties do low-mass stars have?

Answer 2

-Small radius
-Low luminosity
-Red color
-Cooler

Question 3

What are the luminosity of stars proportional to?

Answer 3

Radius^2 x Temperature^4

Question 4

Name a star that’s under spectral type O (hint: it’s a group of stars).

Answer 4

Stars of Orion’s belt

Question 5

Name a star that’s under spectral type B.

Answer 5

Rigel

Question 6

Name a star that’s under spectral type A.

Answer 6

Sirius

Question 7

Name a star that’s under spectral type F.

Answer 7

Polaris

Question 8

Name a star that’s spectral type G.

Answer 8

Sun, Alpha Centauri A

Question 9

Name a star that’s under spectral type K.

Answer 9

Arcturus

Question 10

Name a star that’s under spectral type M.

Answer 10

Betelgeuse, Proxima Centauri

Question 11

What element has most likely existed since the Bing Bang

Answer 11

Helium

Question 12

Why do high-mass stars have much shorter lifetimes than low-mass stars?

Answer 12

Even though high-mass stars have more hydrogen fuel, their rate of fusion is much higher than low mass stars, so they use up their fuel more quickly