Question 1

The spacecraft ________ captured particles that scientists believe came from the ISM.

Accepted Answer

A)  Chandra 
B)  Hubble 
C)  Interstellar Boundary Explorer 
D)  Voyager 
E)  Stardust

Question 2

Which mission is mapping the heliosphere's boundary?

Accepted Answer

A)  Cassini-Huygens 
B)  Interstellar Boundary Explorer 
C)  Voyager I 
D)  Voyager II 
E)  Kepler

Question 3

Which type of nebulae is produced when short-wavelength scatters from the dust and displays a blue hue?

Accepted Answer

A)  emission nebulae 
B)  H I 
C)  reflection nebulae 
D)  dark nebulae 
E)  spectral type B6

Question 4

Why is the sky blue during the day?

Accepted Answer

The answer of Why is the sky blue during the...

Question 5

The type of radiation that is emitted when the electron in a hydrogen atom experiences a spin flip is a(n) _______________.

Accepted Answer

The answer of The type of radiation that is emitted...

Question 6

Molecular clouds are mapped using _____ gas instead of the most-abundant hydrogen because it radiates at radio wavelengths more efficiently.

Accepted Answer

A)  oxygen III 
B)  oxygen II 
C)  helium II 
D)  carbon monoxide 
E)  carbon dioxide

Question 7

The composition of the interstellar dust suggests that it is formed primarily in the atmospheres of cool stars.

Accepted Answer

A) True 
 B)False

Question 8

The intercloud medium is believed to make up 90 percent of the mass of the interstellar medium.

Accepted Answer

A) True 
 B)False

Question 9

H II Regions are also called emission nebulae.

Accepted Answer

A) True 
 B)False

Question 10

Nebula is just another name for the interstellar medium (ISM).

Accepted Answer

A) True 
 B)False

Question 11

What produces the coronal gas?

Accepted Answer

The answer of What produces the coronal gas?...

Question 12

_______________ require that a young hot star (T ≥ 25,000 K) be relatively nearby.

Accepted Answer

The answer of _______________ require that a young hot star...

Question 13

To an observer on Earth, dust in the interstellar medium will cause a star to appear _______________ and_______________than it really is.

Accepted Answer

The answer of To an observer on Earth, dust in...

Question 14

The ISM is easily visible to human eyes.

Accepted Answer

A) True 
 B)False

Question 15

Which component of the interstellar medium has the greatest temperature?

Accepted Answer

The answer of Which component of the interstellar medium has...

Question 16

What observations demonstrate the existence of an interstellar medium?

Accepted Answer

The answer of What observations demonstrate the existence of an...

Exam 10: The Interstellar Medium

The spacecraft ________ captured particles that scientists believe came from the ISM.