1. Homework and Review Questions
Life and death of a star
Homework and Review Questions

2. Q1
List the different stages in life of our star. a) Nebula (earliest) f) b) g) c) h) d) i) e) Planet formation j)last:

3. Q2
List the different stages in life of a much much larger star. a) Nebula (earliest) f) b) g) c) h) d) i) e) Planet formation j)last:

4. Q3
What is the difference between a proto-star and a main sequence star?

5. Q4
What is a nebula?

6. Q5
What stage of stellar evolution is the sun experiencing at this time?
giant
protostar
white dwarf
main-sequence

7. Q6
What are 3 possible events that can cause the nebula to begin to form a star?

8. Q7 All of the gold found on Earth was originally created in Our Sun
In a star about the size of our Sun
In a star much larger than our Sun
In supernovas that occurred before our creation of our sun

9. Q8
What process was used to form the planets in the protostar? How did the process work?

10. Q9
Which type of star maintains a stable size because the energy from fusion balances the force of gravity?
main-sequence
pulsar
neutron star
supergiant

11. Q10
What force pulls all the material together to form the proto-star?

12. Q11
What causes the outward pressure and temperature to increase during the formation of the protostar?

13. Q12
A main-sequence star maintains a stable size as long as it has an ample supply of hydrogen to fuse into
Helium.
Oxygen.
Carbon.
Iron.

14. Q13
What is happens to the solar core and outer shell during the red giant phase of our sun?

15. Q14
What is a planetary nebula? Why does it occur?

16. Q15
What is the difference between a black and white dwarf star?

17. Q16
Why won’t our star go supernova? What would have to be different about our sun for it to explode?

18. Q17 When a white dwarf star no longer emits energy, it may become a
black dwarf.
neutron star.
supernova.
black hole.

19. Q18
What is the chemistry connection between a supernova and the periodic table?

20. Q19
What stage in the life of a star as massive than the sun is missing in this chart?
supernova
black hole
neutron star
red giant

21. Q20
The end of which stage of stellar evolution is marked by the end of helium fusion?
protostar
black dwarf
neutron star
red giant

22. Q21
What does main sequence mean?

23. Q22
In the last stage of stellar evolution following a supernova, stars too massive to form neutron stars may form a
black dwarf.
white dwarf.
red supergiant.
black hole.

24. Q23
In which stage of stellar evolution does a star’s outer shell expand while the inner core contracts?
supernova
main-sequence
red giant
protostar

25. Q24
A star with the same mass of our sun is five times larger and is composed mostly of helium and carbon. Which stage of stellar evolution is the star most likely in? Why?