CP 17 Star Stuff

Question 1

Which of the following stars will live longest?
- 1,2,3 or 4 Solar masses

Answer 1

1

Question 2

What happens when a main-sequence star exhausts its core hydrogen fuel supply?

Answer 2

The core shrinks while the rest of the star expands.

Question 3

The primary source of energy for a star as it grows in size to become a red giant is __________.

Answer 3

hydrogen fusion in a shell surrounding the central core

Question 4

list the stages of life for a low-mass star in the correct order?
(5)

Answer 4

protostar, main-sequence star, red giant, planetary nebula, white dwarf

Question 5

The ultimate fate of our Sun is to __________.

Answer 5

become a white dwarf that will slowly cool with time

Question 6

what happens to a low-mass star after helium flash.

Answer 6

Its luminosity goes down.

Question 7

Which of these elements had to be made in a supernova explosion?

calcium
oxygen
uranium

Answer 7

uranium

Question 8

Why is iron significant to understanding how a supernova occurs?

Answer 8

Iron cannot release energy either by fission or fusion.

Question 9

Which of these stars has the hottest core?
a white main-sequence star
an orange main-sequence star
a red main-sequence star

Answer 9

a white main sequence

Question 10

Which is more common: a star blows up as a supernova, or a star ejects a planetary nebula?

Answer 10

Planetary nebulas are more common.