Question 1

Type II supernovae and star forming regions are related to one another because:

Accepted Answer

A) they both contain ionized hydrogen. 
B) they both involve high mass ionizing stars. 
C) the shock waves of a supernova can trigger star formation. 
D) as a result of both processes, lighter elements are transformed into heavier elements. 
E) all of the above 
A) they both contain ionized hydrogen. 
B) they both involve high mass ionizing stars. 
C) the shock waves of a supernova can trigger star formation. 
D) as a result of both processes, lighter elements are transformed into heavier elements. 
E) all of the above E

Question 2

A massive star can fuse only up to the element silicon in its core.

Accepted Answer

A) True 
 B)False  False

Question 3

The radioactive decay of cobalt 56 into iron 56 affects the light curve of a Type I supernovaabout ________ after the initial peak in luminosity.

Accepted Answer

two months

Question 4

A recurrent nova could eventually build up to a:

Accepted Answer

A) planetary nebula. 
B) Type I supernova. 
C) Type II supernova. 
D) hypernova. 
E) quasar. 
A) planetary nebula. 
B) Type I supernova. 
C) Type II supernova. 
D) hypernova. 
E) quasar.

Question 5

As seen in 1987, when two silicon 28 nuclei fuse, or when seven alpha particles are added toa Si-28 nucleus, the initial result in either case is:

Accepted Answer

A) the shedding of bipolar planetary nebula shells. 
B) a nova explosion. 
C) iron 56. 
D) cobalt 56. 
E) nickel 56. 
A) the shedding of bipolar planetary nebula shells. 
B) a nova explosion. 
C) iron 56. 
D) cobalt 56. 
E) nickel 56.

Question 6

How are elements heavier than iron made? Why are they rare?

Accepted Answer

The elements heavier than iron are forme

Question 7

A 20 solar mass star will stay on the main sequence for 10 million years, yet its iron core canexist for only a:

Accepted Answer

A) day. 
B) week. 
C) month. 
D) year. 
E) century. 
A) day. 
B) week. 
C) month. 
D) year. 
E) century.

Question 8

A Type I supernova involves the collapsing core of a high mass star.

Accepted Answer

A) True 
 B)False

Question 9

Type II supernovae have little hydrogen in their spectra; it had been used up already.

Accepted Answer

A) True 
 B)False

Question 10

What is the importance of 1.4 solar masses in stellar evolution?

Accepted Answer

1.4 solar masses is the Chandrasekhar Li

Question 11

The central star of the Crab Nebula has now collapsed into a(n)________, whose energykeeps this famous nebula visible even in binoculars.

Accepted Answer

The answer of The central star of the Crab Nebula...

Question 12

A surface explosion on a white dwarf, caused by falling matter from the atmosphere of itsbinary companion, creates what kind of object?

Accepted Answer

A) hypernova 
B) nova 
C) gamma-ray burster 
D) Type I supernova 
E) Type II supernova 
A) hypernova 
B) nova 
C) gamma-ray burster 
D) Type I supernova 
E) Type II supernova

Question 13

Nearly all the elements found in nature were formed inside stars, EXCEPT for:

Accepted Answer

A) carbon and silicon. 
B) hydrogen and helium. 
C) helium and carbon. 
D) silver and technetium. 
E) uranium and radium. 
A) carbon and silicon. 
B) hydrogen and helium. 
C) helium and carbon. 
D) silver and technetium. 
E) uranium and radium.

Question 14

Supernova 1987A provided an important confirmation of astronomers' understanding ofType II supernova. The significant observation was:

Accepted Answer

A) the color of the supernova. 
B) the shape of the supernova. 
C) the type of star that produced the supernova. 
D) the detection of neutrinos in advance of the light from the supernova. 
E) the detection of a burst of neutrinos shortly after the light from the supernova. 
A) the color of the supernova. 
B) the shape of the supernova. 
C) the type of star that produced the supernova. 
D) the detection of neutrinos in advance of the light from the supernova. 
E) the detection of a burst of neutrinos shortly after the light from the supernova.

Question 15

Where was supernova 1987A located?

Accepted Answer

A) in the Orion Nebula, M-42 
B) in Sagittarius, near the Galactic Nucleus 
C) in our companion galaxy, the Large Magellanic Cloud 
D) in M-13, one of the closest of the evolved globular clusters 
E) near the core of M-31, the Andromeda Galaxy 
A) in the Orion Nebula, M-42 
B) in Sagittarius, near the Galactic Nucleus 
C) in our companion galaxy, the Large Magellanic Cloud 
D) in M-13, one of the closest of the evolved globular clusters 
E) near the core of M-31, the Andromeda Galaxy

Question 16

A recurring nova could eventually explode as a Type I supernova.

Accepted Answer

A) True 
 B)False

Question 17

Which of these is NOT true about supernovae?

Accepted Answer

A) Type I involves carbon detonation. 
B) Type II involves formation of iron in the core. 
C) The two types are both closely related to evolution of white dwarfs. 
D) The one in 1987 in the Large Magellanic Cloud was of Type II. 
E) Neutronization is vital in understanding Type II core collapse. 
A) Type I involves carbon detonation. 
B) Type II involves formation of iron in the core. 
C) The two types are both closely related to evolution of white dwarfs. 
D) The one in 1987 in the Large Magellanic Cloud was of Type II. 
E) Neutronization is vital in understanding Type II core collapse.

Question 18

Why were neutrinos detected from Supernova 1987A before the photons were detected?

Accepted Answer

Photons interact wit

Question 19

Why should the youngest stars be made of the heaviest elements?

Accepted Answer

With each generation of supern

Question 20

When observing a star that increases dramatically in brightness, if a plateau is observed inthe light curve during the declining phase, the event is probably:

Accepted Answer

A) a nova. 
B) a Type I supernova. 
C) a Type II supernova. 
D) fusion in an accretion disk around a white dwarf. 
E) fusion in an accretion disk around a neutron star. 
A) a nova. 
B) a Type I supernova. 
C) a Type II supernova. 
D) fusion in an accretion disk around a white dwarf. 
E) fusion in an accretion disk around a neutron star.

Exam 21: Stellar Explosions: Novae, Supernovae, and the Formation of the Elements

Type II supernovae and star forming regions are related to one another because:

A massive star can fuse only up to the element silicon in its core.

The radioactive decay of cobalt 56 into iron 56 affects the light curve of a Type I supernovaabout ________ after the initial peak in luminosity.

A recurrent nova could eventually build up to a:

As seen in 1987, when two silicon 28 nuclei fuse, or when seven alpha particles are added toa Si-28 nucleus, the initial result in either case is:

How are elements heavier than iron made? Why are they rare?

A 20 solar mass star will stay on the main sequence for 10 million years, yet its iron core canexist for only a:

A Type I supernova involves the collapsing core of a high mass star.

Type II supernovae have little hydrogen in their spectra; it had been used up already.

What is the importance of 1.4 solar masses in stellar evolution?

The central star of the Crab Nebula has now collapsed into a(n)________, whose energykeeps this famous nebula visible even in binoculars.

A surface explosion on a white dwarf, caused by falling matter from the atmosphere of itsbinary companion, creates what kind of object?

Nearly all the elements found in nature were formed inside stars, EXCEPT for:

Supernova 1987A provided an important confirmation of astronomers' understanding ofType II supernova. The significant observation was:

Where was supernova 1987A located?

A recurring nova could eventually explode as a Type I supernova.

Which of these is NOT true about supernovae?

Why were neutrinos detected from Supernova 1987A before the photons were detected?

Why should the youngest stars be made of the heaviest elements?

When observing a star that increases dramatically in brightness, if a plateau is observed inthe light curve during the declining phase, the event is probably:

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information From the Cosmos

Spectroscopy: the Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earths Sister Planet

Mars: a Near Miss for Life

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Gas and Dust Among the Stars

Star Formation: a Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone

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