The H-R diagram is a plot of which two properties?

1. The H-R diagram is a plot of which two properties?
A-temperature and lifespan
B-temperature and mass
C-spectral type and temperature
D-luminosity and temperature

The H-R diagram is a plot of which two properties?

1. The H-R diagram is a plot of which two properties?
A-temperature and lifespan
B-temperature and mass
C-spectral type and temperature
D-luminosity and temperature

2. Starting from the lower-right of the main sequence (near the M stars) and going toward the upper-left of the main sequence (near the O stars), which of the following stellar properties decreases?
A-mass
B-temperature
C-life span
D-radius

3. According to the H-R diagram, which of these stars is the most massive?
a-a main sequence A star
b-a main sequence K star
c-a main sequence F star

4. According to the H-R diagram, which of these stars is the coolest?
a-a main sequence A star
b-a main sequence K star
c-a main sequence F star

5. According to the H-R diagram, which of these stars has the longest lifetime?
a-a main sequence A star
b-a main sequence K star
c-a main sequence F star

6. What is the most important stellar property when determining what stages, a star will go through when it eventually dies?
A-mass
B-spectral type
C-luminosity
D-temperature

7. Which of the following gases makes up the largest proportion of a star?
A-helium
B-oxygen
C-nitrogen
D-hydrogen

8. Which of the following lists the correct order of the general stages of life and death of a low-mass star?

A-protostar, red giant, white dwarf, main sequence
B-protostar, white dwarf, main sequence, red giant
C-protostar, main sequence, white dwarf, red giant
D-protostar, main sequence, red giant, white dwarf

9. A protostar is a:
A-main sequence star
B-red giant
C-newly forming star
D-black dwarf

10. A planetary nebula is:
A-a cloud of gas out of which new stars form
B-the shell of gas given off by a dying low-mass star
C-another name for a white dwarf
D-a special type of neutron star

11. The ultimate end of our Sun will be:
A-red giant
B-supernova
C-neutron star
D-black dwarf

12. The intense energy needed to form elements heavier than iron comes from:
A-neutron star collapse
B-supernova explosion
C-planetary nebula
D-black hole formation

13. The pulses of radiation coming from a pulsar are due to:
A-extremely high temperatures
B-nuclear fusion within the core
C-the rotation rate
D-leftover heat from its formation

14. What is most likely to form if the remaining core of an exploding type II supernova is greater than 3 solar masses?
A-white dwarf
B-nova
C-neutron star
D-black hole

15. What is the next step for a white dwarf that reaches the Chandrasekhar limit?
A-planetary nebula
B-type IA supernova
C-black dwarf
D-red giant

16. Determine whether the following statements/terms are most associated with a high-mass star or a low-mass star.

Type Ia supernova           high-mass star             low-mass star
Type II supernova            high-mass star             low-mass star
Pulsar                              high-mass star             low-mass star
Black hole                        high-mass star             low-mass star
White dwarf                      high-mass star             low-mass star
Our Sun                            high-mass star             low-mass star

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