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Life and death of a star Homework and Review Questions.

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Presentation on theme: "Life and death of a star Homework and Review Questions."— Presentation transcript:

1 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 formationj)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 formationj)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? a.giant b.protostar c.white dwarf d.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 a.Our Sun b.In a star about the size of our Sun c.In a star much larger than our Sun d.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? a.main-sequence b.pulsar c.neutron star d.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 a.Helium. b.Oxygen. c.Carbon. d.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 a.black dwarf. b.neutron star. c.supernova. d.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? a.supernova b.black hole c.neutron star d.red giant

21 Q20 The end of which stage of stellar evolution is marked by the end of helium fusion? a.protostar b.black dwarf c.neutron star d.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 a.black dwarf. b.white dwarf. c.red supergiant. d.black hole.

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


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