Question 1

A(n) _________ is a collection of 10 to 1000 stars in a region about 25 pc in diameter. The stars in the collection are typically quite young.

Accepted Answer

A)  Herbig-Haro object 
B)  globular cluster 
C)  open cluster 
D)  giant cluster 
E)  supernova

Question 2

When material expanding away from a star in a binary system leaves a star's Roche lobe,

Accepted Answer

A)  the material will start to fall back toward the star. 
B)  all of the material will accrete on to the companion. 
C)  the material is no longer gravitationally bound to that star. 
D)  the material will increase in temperature an eventually undergo thermonuclear fusion. 
E)  c and d.

Question 3

___________ clusters are compact, round, and red, containing mostly old stars.

Accepted Answer

The answer of ___________ clusters are compact, round, and red,...

Question 4

In the orbital plane of a binary star system matter can be transferred from one star to the other through the ___________, located directly between the two stars is the point where the Roche lobes meet.

Accepted Answer

A)  turnoff points 
B)  horizontal branch 
C)  Lagrangian points 
D)  synchrotron points 
E)  radiation belts

Question 5

Giant and supergiant stars are rare because that stage of stellar evolution is short.

Accepted Answer

A) True 
 B)False

Question 6

Electrons moving in a strong magnetic field emit ____________________ radiation.

Accepted Answer

The answer of Electrons moving in a strong magnetic field...

Question 7

The explosion of a supernova type II can leave behind

Accepted Answer

A)  a planetary nebula. 
B)  a shell of hot, expanding gas with a white dwarf at the center. 
C)  a shell of hot, expanding gas with a neutron star at the center. 
D)  Nothing is ever left behind.

Question 8

_________ is a form of electromagnetic radiation produced by rapidly moving electrons spiraling through magnetic fields.

Accepted Answer

A)  Lagrangian radiation 
B)  Accretion 
C)  Ultraviolet radiation 
D)  Synchrotron radiation 
E)  Infrared radiation

Question 9

Why do many planetary nebulae show ring-like features on the sky instead of spheres?

Accepted Answer

The answer of Why do many planetary nebulae show ring-like...

Question 10

A gas in which the pressure no longer depends on the temperature of the gas is said to be ____________________.

Accepted Answer

The answer of A gas in which the pressure no...

Question 11

A planetary nebula

Accepted Answer

A)  produces an absorption spectrum. 
B)  produces an emission spectrum. 
C)  is contracting to form planets. 
D)  is contracting to form a star. 
E)  is the result of carbon detonation in a 1-  star.

Question 12

Even in degenerate matter, pressure depends on temperature.

Accepted Answer

A) True 
 B)False

Question 13

Helium fusion is called the triple-alpha process because

Accepted Answer

A)  the helium nucleus is known as an alpha particle. 
B)  it occurs very rapidly. 
C)  it requires a temperature three times greater than that of hydrogen fusion. 
D)  it is the third source of the primary fusion processes. 
E)  each reaction produces three carbon nuclei.

Question 14

Type II supernovae are believed to occur when the cores of massive stars collapse.

Accepted Answer

A) True 
 B)False

Question 15

Stars with ˜0.4-4 solar masses swell into giants when hydrogen is exhausted in their centers.

Accepted Answer

A) True 
 B)False

Question 16

A star begins fusing hydrogen to helium the moment it leaves the main sequence.

Accepted Answer

A) True 
 B)False

Question 17

Mass is transferred from a normal star in a close binary system toward a white dwarf. The material that is transferred to the white dwarf forms a rapidly growing whirlpool of material known around the white dwarf known as a(n)

Accepted Answer

A)  accretion disk. 
B)  Lagrangian point. 
C)  Algol paradox. 
D)  planetary nebula. 
E)  supernova remnant.

Question 18

Hydrogen fusion does not occur in stars in the giant region of the H-R diagram.

Accepted Answer

A) True 
 B)False

Question 19

The SN 1987A event shown above is which type of supernova?

Accepted Answer

A)  Type Ia 
B)  Type Ib 
C)  Type II 
D)  None of the other choices are correct.

Question 20

The nebula shown above is an example of a _____________ nebula.

Accepted Answer

A)  emission 
B)  absorption 
C)  dark 
D)  planetary

Exam 10: The Deaths of Stars

A(n) _________ is a collection of 10 to 1000 stars in a region about 25 pc in diameter. The stars in the collection are typically quite young.

When material expanding away from a star in a binary system leaves a star's Roche lobe,

___________ clusters are compact, round, and red, containing mostly old stars.

In the orbital plane of a binary star system matter can be transferred from one star to the other through the ___________, located directly between the two stars is the point where the Roche lobes meet.

Giant and supergiant stars are rare because that stage of stellar evolution is short.

Electrons moving in a strong magnetic field emit ____________________ radiation.

The explosion of a supernova type II can leave behind

_________ is a form of electromagnetic radiation produced by rapidly moving electrons spiraling through magnetic fields.

Why do many planetary nebulae show ring-like features on the sky instead of spheres?

A gas in which the pressure no longer depends on the temperature of the gas is said to be ____________________.

A planetary nebula

Even in degenerate matter, pressure depends on temperature.

Helium fusion is called the triple-alpha process because

Type II supernovae are believed to occur when the cores of massive stars collapse.

Stars with ˜0.4-4 solar masses swell into giants when hydrogen is exhausted in their centers.

A star begins fusing hydrogen to helium the moment it leaves the main sequence.

Mass is transferred from a normal star in a close binary system toward a white dwarf. The material that is transferred to the white dwarf forms a rapidly growing whirlpool of material known around the white dwarf known as a(n)

Hydrogen fusion does not occur in stars in the giant region of the H-R diagram.

The SN 1987A event shown above is which type of supernova?

The nebula shown above is an example of a _____________ nebula.