Astronomy 120 - Stars and Galaxies » Fall 2022 » Test No. 2

Need help with your exam preparation?

Existing Quiz Clients Login here
Question #1
Sun spots are most closely associated with
A.   solar flares.
B.   magnetic fields.
C.   thermonuclear fusion.
D.   coronal mass ejections.
Question #2
The blackbody spectrum of the Sun peaks in which part of the electromagnetic spectrum?
A.   infrared
B.   ultraviolet
C.   x-ray
D.   visible
Question #3
What can we determine by the parallax angle of a star?
A.   The star's temperature.
B.   The star's distance.
C.   The star's intensity.
D.   The star's composition.
Question #4
The parallaxes of nearby stars are produced by
A.   Earth's rotation (spin) on its axis.
B.   stellar motion along our line of sight.
C.   stellar motion across our line of sight.
D.   Earth's revolution (orbit) around the sun.
Question #5
According to table below, which star appears the brightest to those living in Glendale? Star Absolute Magnitude (M) Apparent Magnitude (m) Star A –3.2 3.2 Star B 1.5 7.5 Star C 4.9 4.9 Star D –5.1 0.5
A.   Star C
B.   Star B
C.   Star A
D.   Star D
Question #6
You have discovered a new star. This star's hydrogen lines (the Fraunhofer lines caused by electron transitions within hydrogen atoms) were seen to be very wide. This identifies the star as a
A.   main sequence star
B.   protostar
C.   Bok globule
D.   supergiant star
Question #7
Stars in the upper left corner of the HR diagram are
A.   cool and bright.
B.   hot and dim.
C.   hot and bright.
D.   cool and dim.
Question #8
Stars form within nebulae that emit
A.   21 cm light.
B.   visible light.
C.   ultraviolet light.
D.   2.6 mm or 1.3 mm wavelengths.
Question #9
HII regions, also known as emission nebulae, are famous for
A.   their colorful appearance.
B.   their location, far from any stars.
C.   their cool temperature.
D.   their noxious (unpleasant) odor from emissions.
Question #10
What are the pre-main sequence evolutionary paths of stars on the HR Diagram called?
A.   Hayashi tracks
B.   Lee lines
C.   Newton trails
D.   Morimoto remnants
Question #11
There are stars that are brighter than the Sun.
A.   False
B.   True
Question #12
The mass of a red giant star can be determined from its placement on the HR diagram.
A.   True
B.   False
Question #13
The dust in the ISM within the galaxy is smaller in size than the hydrogen molecules of the molecular nebulae within the galaxy.
A.   True
B.   False
Question #14
If a star was moved twice as far from us as it presently is, it would appear half as bright.
A.   True
B.   False

Need help with your exam preparation?

Existing Quiz Clients Login here