Life and death of a star

Homework and Review Questions

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:

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:

Q3

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

Q4

What is a nebula?

Q5

What stage of stellar evolution is the sun experiencing at this time?

a. giantb.protostarc. white dwarfd.main-sequence

Q6

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

Q7

All of the gold found on Earth was originally created in

a. Our Sunb.In a star about the size of our Sunc. In a star much larger than our Sund.In supernovas that occurred before our

creation of our sun

Q8

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

Q9

Which type of star maintains a stable size because the energy from fusion balances the force of gravity?

a. main-sequenceb.pulsarc. neutron stard.supergiant

Q10

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

Q11

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

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.

Q13

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

Q14

What is a planetary nebula? Why does it occur?

Q15

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

Q16

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

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.

Q18

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

Q19

What stage in the life of a star as massive than the sun is missing in this chart?

a. supernovab. black holec. neutron stard. red giant

Q20

The end of which stage of stellar evolution is marked by the end of helium fusion?

a. protostarb.black dwarfc. neutron stard.red giant

Q21

What does main sequence mean?

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.

Q23

In which stage of stellar evolution does a star’s outer shell expand while the inner core contracts?

a. supernovab.main-sequencec. red giantd.protostar

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?