Question 1

Which of the following is responsible for heating the bulk of the very hot intercloud gas?

Accepted Answer

A)   high-energy radiation from stars
B)   supernovae
C)   young O and B stars
D)   planetary nebulae
E)   The heating is an even mix of all of the sources above.F) None of the above
G) C) and E)

Question 2

How are Herbig-Haro objects related to T Tauri stars?

Accepted Answer

Herbig-Haro objects are ionized gas form...

Question 3

The dust in the interstellar medium comes primarily from the stellar winds of main-sequence stars.

Accepted Answer

A) True 
 B)False

Question 4

The figures below show the spectrum of a star, along with five other spectra labeled A through E.  Which one of the labeled spectra shows what the spectrum of that star would look like if it were viewed through a significant amount of interstellar dust?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) A) and C)
G) A) and D)

Question 5

Why do stars form most often within molecular clouds?

Accepted Answer

Because that is wher...

Question 6

Sitting in a 100°F hot tub feels much hotter than standing outside on a 100°F day. This analogy illustrates why:

Accepted Answer

A)   interstellar dust is dark at optical wavelengths, but bright in the infrared
B)   supernovae can heat their shells to such high temperatures
C)   an astronaut would feel cold standing in the 106 K intercloud gas
D)   the Solar System is immersed in a hot bubble of gas
E)   fusion only occurs in the cores of starsF) B) and D)
G) None of the above

Question 7

The source of energy for a contracting protostar comes from:

Accepted Answer

A)   thermonuclear energy
B)   kinetic energy
C)   chemical energy
D)   gravitational potential energy
E)   radiation energyF) C) and D)
G) None of the above

Question 8

When looking at the space between stars, what might you see?

Accepted Answer

A)   Nothing; it is empty.
B)   spacecraft
C)   gas
D)   dark matter
E)   none of the aboveF) A) and B)
G) A) and C)

Question 9

If you wanted to study regions where star formation is currently happening you could use:

Accepted Answer

A)   H-alpha emission to look for O and B stars
B)   21 cm radiation to find neutral hydrogen clouds
C)   radio emission from carbon monoxide (CO)  to find molecular cloud cores
D)   infrared emission to identify T Tauri stars
E)   all of the aboveF) B) and D)
G) A) and E)

Exam 15: Star Formation and the Interstellar Medium

The dust in the interstellar medium comes primarily from the stellar winds of main-sequence stars.

Correct Answer
verified

If you wanted to study regions where star formation is currently happening you could use:

Correct Answer
verified

Why do stars form most often within molecular clouds?

Correct Answer
verified
Because that is wher...
View Answer

Which of the following is responsible for heating the bulk of the very hot intercloud gas?

Correct Answer
verified

How are Herbig-Haro objects related to T Tauri stars?

Correct Answer
verified
Herbig-Haro objects are ionized gas form...
View Answer

Sitting in a 100°F hot tub feels much hotter than standing outside on a 100°F day. This analogy illustrates why:

Correct Answer
verified

When looking at the space between stars, what might you see?

Correct Answer
verified

The figures below show the spectrum of a star, along with five other spectra labeled A through E. Which one of the labeled spectra shows what the spectrum of that star would look like if it were viewed through a significant amount of interstellar dust?

Correct Answer
verified

The source of energy for a contracting protostar comes from:

Correct Answer
verified

Exam 15: Star Formation and the Interstellar Medium

The dust in the interstellar medium comes primarily from the stellar winds of main-sequence stars.

Correct AnswerverifiedShow Answer

If you wanted to study regions where star formation is currently happening you could use:

Correct AnswerverifiedShow Answer

Why do stars form most often within molecular clouds?

Correct AnswerverifiedBecause that is wher...View AnswerShow Answer

Which of the following is responsible for heating the bulk of the very hot intercloud gas?

Correct AnswerverifiedShow Answer

How are Herbig-Haro objects related to T Tauri stars?

Correct AnswerverifiedHerbig-Haro objects are ionized gas form...View AnswerShow Answer

Sitting in a 100°F hot tub feels much hotter than standing outside on a 100°F day. This analogy illustrates why:

Correct AnswerverifiedShow Answer

When looking at the space between stars, what might you see?

Correct AnswerverifiedShow Answer

The figures below show the spectrum of a star, along with five other spectra labeled A through E. Which one of the labeled spectra shows what the spectrum of that star would look like if it were viewed through a significant amount of interstellar dust?

Correct AnswerverifiedShow Answer

The source of energy for a contracting protostar comes from:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Because that is wher...
View Answer

Correct Answer
verified

Correct Answer
verified
Herbig-Haro objects are ionized gas form...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified